Key takeaways

• SSL certificate management requires three things: finding every certificate your business uses, renewing and installing each one automatically before it expires, and keeping the freedom to switch certificate providers or encryption methods when industry rules change.
• Once validity drops to 47 days in 2029, public TLS certificates will need renewing every six to seven weeks, so renewal volume grows quickly for organizations with large certificate estates.
• Discovery, automated renewal, CA-agility, and 47-day and post-quantum readiness are key decision factors, as validity periods shrink and RSA and ECC are phased out.
• AppViewX leads on all four: mapping certificates across every environment, automating their journey from request to installation, working with any CA, and preparing the estate for new algorithms.
• DigiCert, Keyfactor, and AWS Certificate Manager fit specific needs: a single CA vendor, open-source PKI, and AWS-only workloads.

Public TLS certificates issued on or after March 15, 2026, can be valid for no more than 200 days, down from the previous limit of 398. Under the CA/Browser Forum’s approved schedule, that maximum drops to 100 days in March 2027 and 47 days in March 2029.

Every reduction multiplies renewal volume across the entire certificate estate. The SSL certificate management tools built for that volume are the ones that take people out of the renewal loop entirely.

What to look for in an SSL certificate management tool

Essential factors apply to any enterprise managing certificates at scale, while situational factors depend on the vendors and tooling already in place.

Certificate discovery across hybrid and multi-cloud

Automation, policy, and audit reporting only reach the certificates in the inventory. With 73% of organizations now running a hybrid cloud strategy, certificates sit across public clouds, on-prem data centers, load balancers, and containers, often issued by different teams through different CAs.

Strong discovery covers both public and private trust certificates, runs continuously, and captures context such as location, owner, chain of trust, and crypto strength alongside each expiry date.

AppViewX discovery engine

AppViewX Smart Discovery scans across your environments to surface unmanaged, rogue, and non-compliant certificates, then brings them into one live inventory. Ownership and policy enforcement apply from the moment a certificate is found, so every certificate it surfaces has an accountable owner.

Trusted CA and vendor support

Buying certificates and the software that manages them from the same issuer is the shortest path for many organizations. One vendor handles issuance, validation, and support, which speeds up procurement and keeps every support conversation in one place.

DigiCert ONE CA platform

DigiCert pairs a long-established public CA with support that reviewers consistently call out, and one G2 reviewer describes it as a well-trusted source across its range of offerings.

Governance is the area to probe during evaluation. DigiCert ONE scores 6.7/10 for audit and enforcement on G2, below the 8.5 category average.

AppViewX covers similar ground for private certificates. Its crypto-agile, CLM-integrated PKI issues them on the same platform that manages them, while public certificates keep coming from the CAs an organization already trusts.

Multi-CA support and CA-agility

Relying on a single CA ties every certificate to that CA’s standing with browsers. In June 2024, Google announced Chrome would distrust new certificates chaining to Entrust roots after six years of compliance failures, leaving Entrust customers until November 2024 to move new issuance to another provider.

A CA-agile platform supports multiple CAs side by side, applies one policy across all of them, and reissues certificates from a new CA in bulk.

AppViewX CA flexibility

Built for CA-agility with no CA lock-in, AppViewX lets security teams shift issuance between providers without rebuilding workflows. Its crypto-agile PKI runs on the same platform, so internally issued certificates get the same visibility and governance as those from public CAs.

Automated certificate renewal and deployment

At 47-day validity, each public certificate renews about eight times a year, so an estate of 5,000 certificates adds up to roughly 39,000 renewals annually. Containers raise the count further: 82% of container users now run Kubernetes in production, where certificates spin up and retire alongside the workloads they protect.

Full automation spans the entire chain: enrollment, approval, issuance, installation, and confirmation that the new certificate is live.

AppViewX lifecycle automation

Closed-loop automation runs the lifecycle end to end, including binding certificates to load balancers, web servers, and other endpoints, and AppViewX CLM for Kubernetes carries it into container environments. On G2, AppViewX earns 9.2/10 for workflow and the same score for audit and enforcement, ahead of DigiCert ONE and Keyfactor EJBCA on each.

Explore how can accelerate your 47-day readiness. can accelerate your 47-day readiness.

Open-source, standards-based PKI

PKI engineers who want to inspect, extend, and self-host their CA software look for an open-source foundation first.

Keyfactor EJBCA for PKI teams

EJBCA comes from the creators of the EJBCA Community open-source CA and remains a common pick for private PKI built on open standards, with a G2 reviewer highlighting its standards-based design.

Workflow automation deserves a closer look, since EJBCA scores 7.6/10 for workflow on G2.

AppViewX supports the same protocol-driven approach. The platform handles ACME-based issuance and renewal and ships with pre-configured ACME clients, so PKI teams can automate renewals without building custom integrations.

Native certificate management for AWS workloads

Organizations that run entirely on AWS often prefer certificate management built into the console they already use, with no separate platform to deploy or license.

AWS Certificate Manager (ACM)

ACM attaches certificates directly to AWS services and holds a 4.5/5 rating on G2 across 58 reviews. One G2 reviewer singles out its seamless integration with ELB, CloudFront, and API Gateway, adding that public certificates come free.

The same reviewer notes that AWS-managed public certificates can’t easily be exported for use elsewhere, and that certificates are tied to individual regions. That makes ACM a strong fit inside one cloud and a harder one to stretch across hybrid estates.

For organizations that pair AWS with other clouds or on-prem systems, AppViewX integrates directly with AWS services, including EC2, ELB, ACM, IAM, and CloudFront. Teams can keep ACM in place across multiple AWS accounts and manage those certificates alongside every other certificate they hold.

47-day TLS and post-quantum readiness

The same CA/Browser Forum ballot cuts how long a CA can reuse domain validation data, from 398 days to 10 days by March 2029, which brings validation into almost every renewal. On the cryptography side, NIST has finalized its first PQC standards and proposed deprecating RSA and ECC after 2030, with full disallowance after 2035.

Both come down to changing certificates and the algorithms behind them across the full estate on short notice.

AppViewX crypto-agility

Dedicated 47-day readiness dashboards benchmark the estate against every step of the schedule, alongside insight into cipher strength, hashing algorithms, and key sizes. Post-quantum readiness capabilities then reissue certificates with stronger algorithms across thousands of endpoints. AppViewX is also named a Leader in the 2026 IDC MarketScape for worldwide CLM software.

How to choose the right SSL certificate management tool

Shortlist on the essential criteria first, then use situational strengths as tiebreakers. Asking every vendor the same questions in a demo makes their answers directly comparable.

Why AppViewX for SSL certificate management

AppViewX treats SSL/TLS as one part of a broader machine identity program. The AppViewX platform that manages public and private TLS certificates also covers SSH keys, code signing, and AI agent identities, so security teams govern every machine credential through a single console.

That breadth rests on more than a decade of building PKI and machine identity infrastructure for some of the world’s largest banks, manufacturers, and insurers.

AppViewX and Citrix Joint Solution

Automating Certificate Management for Citrix FAS with AppViewX AVX

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Securing user and machine identities while enabling seamless authentication is critical, especially for organizations operating across hybrid, multi-cloud infrastructures. The Citrix Federated Authentication Service (FAS) plays a central role in this process, acting as a privileged service that integrates with Active Directory Certificate Services (AD CS) or federated identity providers, such as ADFS or SAML, to issue certificates for users dynamically. These certificates enable users to log in to Citrix StoreFront, XenApp, and XenDesktop virtual environments as if they were using physical smart cards.

FAS has become an essential component for securing access to Virtual Desktop Infrastructure (VDI) and Virtual Delivery Agents (VDAs) by enabling strong, certificate-based authentication without the complexity of managing physical tokens.

However, as organizations scale their Citrix environments, managing certificates across hundreds or thousands of users becomes overwhelming. Manual processes create risk, complexity, and administrative overhead. AppViewX addresses these challenges through automated certificate lifecycle management, ensuring authentication across Citrix environments remains secure, reliable, and fully policy-compliant at scale.

The following diagram illustrates how Citrix FAS integrates with a Certificate Authority (CA) to provide services to StoreFront, XenApp, and XenDesktop Virtual Delivery Agents (VDAs).

Certificate Lifecycle Management (CLM) Challenges in Citrix FAS Environments

As organizations scale their Virtual Delivery Agent (VDA) environments, the number of certificates grows rapidly, and with it, operational and security challenges.

• Managing Certificate Lifecycles: In large Citrix deployments, thousands of user and machine certificates need to be issued, renewed, and revoked on time. Doing this manually is slow, error-prone, and resource-intensive, increasing the risk of unexpected expirations that can block access to virtual desktops and apps.
• Ensuring Compliance: Organizations must meet stringent security standards and regulatory mandates for encryption, certificate usage, and PKI practices. Without a centralized system, ensuring compliance across multiple CAs, certificate templates, and environments becomes complex.
• Scaling Across Platforms: Modern VDI deployments often span on-premises, cloud, and hybrid environments, with a mix of Windows and Linux VDAs. A single, unified CLM system is essential to manage certificates consistently across all these platforms.

How AppViewX AVX Simplifies Certificate Lifecycle Management in Citrix FAS

Securing Citrix VDI environments requires reliable certificate lifecycle management across hybrid and multi-cloud deployments. AppViewX AVX CLM delivers this through holistic visibility, end-to-end automation, and policy-driven control of certificates, ensuring trust across machines, workloads, applications, and cloud services.

Its industry-leading features include smart discovery, actionable insights dashboards (such as 47-Day TLS, PQC, and Enterprise Crypto-Scoring), closed-loop automation workflows, intuitive self-service, and zero-touch policy enforcement. By streamlining CLM for all certificate types across leading public and private Certificate Authorities (CAs), AVX CLM enhances enterprise-wide crypto-agility, mitigates machine identity risks, and empowers cross-functional teams to focus on innovation and growth.

How the Integration Works

When a user attempts to log on to a Citrix Virtual Delivery Agent (VDA), the logon request is sent to the Federated Authentication Service (FAS). After authenticating the user through Active Directory (AD), FAS connects to the AppViewX AVX platform via a cloud connector that resides in the same Active Directory domain as FAS.

AppViewX then issues the required certificate, which is attached to the VDA machine. The Windows domain then recognizes this as a standard smart card authentication, allowing the user to log in securely.

Whenever Citrix FAS requests either a CA certificate or a user certificate, the AppViewX cloud connector receives the request in DCOM/DCERPC format. It parses and processes the request, then forwards it to the AppViewX application using standard REST API calls to obtain the certificate from the appropriate Certificate Authority (CA).

The necessary certificate template or profile must be preconfigured within the CA context, enabling AppViewX AVX CLM to issue the certificate in the correct format with all required Extended Key Usage (EKU) and Key Usage (KU) fields.

All issued certificates are automatically logged within the AVX platform. Administrators can configure expiry alerts and auto-renewal policies to ensure certificates are monitored and auto-renewed before expiration, maintaining continuous authentication and minimizing operational risk.

Benefits of the Citrix FAS and AppViewX AVX CLM Integration

The integration of AppViewX AVX CLM with Citrix FAS solves critical CLM challenges. Together, they deliver a unified, automated, and compliant certificate lifecycle management solution purpose-built for Citrix VDI environments.

• Centralized and Automated Certificate Lifecycle Management: AVX CLM provides a single platform to manage all certificates issued through Citrix FAS across Windows and Linux VDAs. It provides complete visibility into certificate expiry dates, trust chains, and configurations, while automating critical processes, including issuance, renewal, and revocation. This eliminates manual effort, reduces administrative overhead, and ensures certificates are always valid and trusted.
• Seamless User Experience and Continuous Access: Expired or mismanaged certificates can cause authentication failures and disrupt user logins to Citrix VDAs. AVX CLM automates certificate renewals and enforces proactive alerts, ensuring users always have a valid and trusted certificate to seamlessly authenticate without disruptions. This results in a more consistent and secure user experience.
• Multi CA Flexibility: For Citrix environments that require certificates from multiple Certificate Authorities (CAs), AVX CLM serves as a unified proxy for Citrix FAS, retrieving certificates from a broad range of public and private CAs. This eliminates dependency on Microsoft CA alone and extends flexibility for organizations using custom CA hierarchies.
• Security, Compliance, and Policy Enforcement: AVX CLM enforces strict enterprise-grade PKI policies to ensure all certificates used by Citrix FAS comply with corporate and regulatory mandates. Certificates are issued with correct templates, including KU and EKU fields, to maintain consistency in authentication policies across environments and strengthen Zero Trust architectures.
• Scalable for Hybrid and Multi-Cloud Environments: Whether deploying on-premises, in the cloud, or in a hybrid environment, AVX CLM scales effortlessly across thousands of Citrix VDAs. It allows Citrix FAS to issue and manage certificates across various VDAs, including both Windows and Linux platforms. It supports large Citrix deployments with hundreds or thousands of users, ensuring scalability.
• Increased Security and Compliance: As enterprises increasingly adopt Zero Trust models, protecting digital identities with strict cryptographic policies becomes crucial. The integration of AVX CLM with Citrix FAS ensures that certificates are issued with correct templates, KU, and EKU fields, maintaining consistency in authentication policies across the board. This helps adhere to corporate policies and regulatory requirements, minimizing vulnerabilities and reducing compliance risks.

The integration of Citrix FAS with AVX CLM transforms how organizations manage certificates in their VDI environments. By improving visibility, fully automating certificate lifecycle management, and implementing policy-driven control, organizations can significantly reduce the risk of authentication failures, avoid costly outages, reduce administrative overhead, maintain compliance, and strengthen their security posture.

About Citrix System, Inc.

Citrix Systems is a global leader in secure access and virtualization technologies that empower organizations to deliver applications and desktops seamlessly to users anywhere. Citrix Federated Authentication Service (FAS) is a key component of Citrix Virtual Apps and Desktops, enabling secure, passwordless single sign-on by integrating with enterprise Public Key Infrastructure (PKI). FAS simplifies authentication management while enhancing user experience and security across virtual environments. Citrix currently serves more than 330,000 organizations worldwide and is headquartered in Fort Lauderdale, Florida. For more information, visit www.citrix.com.

Change is coming to SSL/TLS certificate management, and it’s arriving faster than most organizations realize. The CA/B Forum’s version of “March Madness” will start rolling out within months and culminate in a rigorous 47-day maximum certificate validity requirement by 2029. The 47-day mandate will force a new approach to outdated manual CLM approaches for several reasons:

• Shorter validity periods mean stronger security posture – Less time for compromised certificates to cause damage, faster revocation cycles, and reduced exposure windows
• Forced automation eliminates human error – Manual certificate management becomes impossible at scale, driving the necessary shift to automated systems
• Competitive differentiation through operational excellence – While competitors struggle with compliance, you’re delivering seamless, uninterrupted services
• Foundation for crypto-agility – The infrastructure you build for 47-day compliance becomes your platform for post-quantum cryptography readiness and future algorithm transitions

Skip the Scramble: Start Scanning Today  

Organizations that embrace this change now will emerge with certificate management capabilities that their competitors won’t match for years.

The Scramble vs. The Strategic Advantage

We’re already seeing two distinct paths emerge in the market. Some organizations are waiting it out, hoping the mandate will be delayed or diluted. Others are seizing the moment, using this transition as their catalyst for CLM modernization.

When compliance deadlines loom, scrambling organizations typically rush to implement band-aid solutions that barely meet requirements and suffer the resulting outages and service disruptions.

Forward-thinking IT security experts will lead their organizations using  a different approach:

• Building comprehensive discovery capabilities that reveal their complete SSL/TLS certificate landscape. This is not just the publicly visible certificates, but the hidden infrastructure certificates that pose the real operational risk.
• Implementing automated lifecycle management that handles certificate provisioning, renewal, and revocation seamlessly across all environments—from public cloud to private networks to edge devices.
• Creating crypto-agile architectures that can adapt to algorithm changes, post-quantum cryptography, and future security requirements without massive infrastructure overhauls.
• Establishing governance frameworks that enforce consistent security policies while supporting business agility and compliance requirements.

Most organizations have no clear picture of how many SSL/TLS certificates they actually have or where those certificates live. The reality is that they are spread across:

• Internal network infrastructure – Servers, databases, APIs, and applications that never appear in public scans.
• Cloud-native environments – Container orchestration platforms, microservices, and serverless functions, each with unique certificate requirements
• Development and staging systems – Non-production environments that still need valid certificates for testing and integration
• IoT and edge devices – Connected devices and edge computing platforms with embedded certificates
• Legacy applications – Older systems still running with forgotten certificates 

The bottom line: You can’t manage what you can’t see, and you can’t secure what you don’t know exists.

The Crypto-Agile Advantage: Future-Proofing for the 47-Day Mandate and More

The 47-day mandate is just the beginning. Post-quantum cryptography is coming. New algorithms will emerge. Security standards will evolve. The infrastructure you build to handle shorter certificate lifespans becomes your foundation for adapting to all of these changes.

Crypto-agility means:

• Seamless algorithm transitions when new cryptographic standards emerge
• Rapid response capabilities for security vulnerabilities or algorithm compromises
• Standardized processes that can accommodate and work seamlessly across multiple certificate authorities and  environments 
• Automated policy enforcement that adapts to changing compliance requirements
• Zero-downtime updates that maintain service availability during security transitions

Organizations building crypto-agile certificate management now will handle future changes with confidence while their competitors struggle through each new requirement.

Building Your 47-Day TLS Advantage: The Practical Steps

So how do forward-thinking organizations actually make this transition? It starts with understanding where you are, then building toward where you need to be.

Step 1: Complete Discovery and Assessment

• Get the full picture of your SSL/TLS certificate landscape—not just the public certificates, but every certificate across every environment. Most organizations discover they have 10-100 times more certificates than they realized.
• Assess your current processes for certificate lifecycle management, crypto-agility readiness, and 47-day compliance gaps. A clear baseline is essential for planning your modernization journey.

Step 2: Design Your Modernization Strategy

• Develop a roadmap that addresses immediate 47-day TLS compliance needs while building long-term crypto-agility capabilities. The best strategies solve today’s problems while positioning for tomorrow’s requirements.
• Plan your automation architecture to handle certificate lifecycle management at enterprise scale across all environments and certificate authorities.

Step 3: Implement and Optimize

• Deploy automated certificate lifecycle management that can handle the operational requirements of 47-day TLS certificates while supporting your broader security and compliance goals.
• Establish governance policies that ensure consistent security standards while supporting business agility and growth.
• Build monitoring and alerting systems that provide visibility into certificate health and proactive management of potential issues.

Schedule a consultation to discuss your specific modernization strategy →

The Time to Act Is Now

PacificSource recently modernized its certificate lifecycle management program, automating and ensuring crypto-agility for IT security. What they knew that others don’t is that the organizations that will thrive in the 47-day TLS era are the ones taking action today. While competitors debate and delay, they’re building the certificate management capabilities that will serve as competitive advantages for years to come.

The window for strategic positioning is closing. Organizations that wait until compliance deadlines are imminent will be forced into reactive, sub-optimal solutions. Those that act now can build comprehensive, crypto-agile certificate management programs that position them as industry leaders.

Your next move matters. Will you be among the organizations that use this transition to leapfrog competitors, or will you be scrambling to catch up while they pull ahead?

The choice is yours, but the time to choose is now.

Ready to Build Your 47-Day TLS Advantage?

Don’t wait for the scramble. Start building your competitive advantage today with a comprehensive understanding of your SSL/TLS certificate landscape and a strategic plan for modernization.

Your next steps:

 Run a Free SSL/TLS Certificate Discovery Scan to see your complete certificate inventory

 Book a Platform Demo to see how automated certificate lifecycle management works in practice

 Speak with a Certificate Lifecycle Expert to discuss your specific requirements and challenges