Executive Summary
Local application authentication was a practical choice when users worked primarily inside a corporate network and enterprise applications operated as independent systems. Today’s threat landscape, remote workforce, and growing number of connected applications have changed the role of identity.
Identity modernization is not a requirement to adopt one specific vendor or architecture. It is a progression toward more centralized, consistent, and verifiable access decisions.
Yesterday’s Local Authentication Model
Many PLM deployments maintain users through a local LDAP directory or another application-specific identity store. This can be simple and appropriate, particularly for smaller organizations with limited IT resources. As an organization grows, however, separate user repositories can create operational challenges: independent passwords, manual onboarding and offboarding, inconsistent policies, fragmented auditing, and uncertainty about who still has access.
The architecture was not wrong. It simply was not designed for today’s identity-centric security model.
The Security Perimeter Has Changed
Firewalls, VPNs, and server hardening remain important, but attackers increasingly target identities. Stolen credentials can allow an attacker to sign in through the same paths used by legitimate employees, contractors, and administrators.
That changes the core security question from “Is the user inside our network?” to “Who is requesting access, how was the identity verified, and is this request appropriate?”
Methods For Verifying Identity
Organizations have various options for authenticating the identity of users.
- Local Directory: Application-managed users and passwords
- Central Directory: Shared identity and lifecycle management
- Identity Provider: Enterprise authentication and governance
- Single Sign-On: One identity across approved applications
- Multi-Factor: Verification beyond a password
- Adaptive Access: Context, device, location, and risk
- Zero Trust: Continuous verification and least privilege
What Each Method Can Solve
| Method | Security Value | Operational Value |
|---|---|---|
| Local directory | Basic application authentication | Simple deployment for a contained environment |
| Central directory | Consistent account and password controls | Improved onboarding and offboarding |
| Enterprise identity provider | Central policy, authentication visibility, and governance | A common identity layer for cloud and on-premises applications |
| Single Sign-On | Reduces separate application passwords | Less password friction and fewer support requests |
| Multi-Factor Authentication | Reduces the value of a stolen password | Stronger access with manageable user impact |
| Adaptive or conditional access | Responds to device, location, and sign-in risk | More precise policies than a universal allow-or-deny rule |
| Zero Trust practices | Continuous verification and least privilege | A repeatable framework for access decisions |
Vendor-Neutral Options
Microsoft Active Directory and Microsoft Entra ID are common in Windows-centric organizations, but they are not the only approaches. Depending on the environment, an organization may evaluate Okta, JumpCloud, Ping Identity, Google Workspace identity capabilities, or another standards-based identity provider.
The more important questions are whether the platform supports the organization’s applications, security policies, lifecycle processes, compliance needs, available skills, and budget.
When Is Modernization Worth Considering?
- New hires and terminations require updates in several separate systems.
- Remote or privileged access depends primarily on a password.
- IT cannot quickly determine who accessed a critical application.
- Users maintain multiple passwords for core business systems.
- Contractor and supplier access is difficult to review or revoke.
- Security policies differ significantly across applications.
Six Questions to Evaluate Access Security
- Can every user be uniquely identified?
- Can privileged and remote access require stronger authentication?
- Can access be disabled promptly across connected systems?
- Are authentication events visible in a central location?
- Can policies reflect role, device, location, or risk where needed?
- Does the identity approach fit the organization’s current size and likely growth?
Advisor’s Perspective
Identity modernization should solve a real business or security problem. A small company may reasonably continue using local authentication while strengthening passwords, remote access, account reviews, and administrative practices. A growing organization may benefit from central identity well before it needs a fully mature zero-trust architecture.
The objective is not to follow a prescribed technology sequence. It is to understand the tradeoffs and adopt the capabilities that reduce risk and administrative burden at the right time.
