Identity security is the perimeter: Overcoming Active Directory's pain points

A quarter of a century after it first appeared, Windows Active Directory (AD) still defines on-premise networking. But there's no getting around it: AD is an aging identity system. It was built for a simpler time, when security meant one thing: a safe internal network and a dangerous external world.

That world no longer exists.

Today, users and data are everywhere. The perimeter is wherever they happen to be. And securing a network now means carefully managing the identities of everyone who accesses it, a task that credential theft and phishing make harder every day.

AD's limitations make this genuinely difficult. The pain points are numerous enough that many organizations simply migrate to a cloud-based platform like Entra ID instead.

But that comes with its own headaches: complex migrations, high costs, and a growing dependency on a third-party cloud identity provider (IdP).

The shift to cloud is rarely all-or-nothing. Larger organizations tend to move to cloud IAM platforms like Entra ID, but many small and mid-sized businesses stick with on-premise AD, and for good reasons.

On-premise AD makes it easier to support older applications that work well but can't easily move to the cloud. In some sectors, keeping sensitive data on-premise is a regulatory or security requirement. And compared to cloud IAM licensing costs, AD is simply cheaper.

AD's pain points fall into two categories: weaknesses built into its aging architecture, and missing features that make it hard to manage securely today.

The biggest architectural problem is its reliance on passwords. If a user presents a valid password, AD assumes that user is legitimate. By today's zero trust standards, that's a dangerous assumption, passwords get stolen, and attackers can impersonate real users in ways that are hard to detect.

From there, attackers can try to elevate their privileges and eventually compromise AD itself. If that happens, they gain full control of the network.

On top of that, AD lacks several critical features: MFA, SSO, contextual access control, user monitoring, concurrent session limits, and proper compliance logging.

The fix isn't to replace AD, it's to extend it.

You can do that with a cloud IdP, but that means a time-consuming migration and a loss of control. Cloud IdPs also mean outsourcing your authentication database to a third party, making you dependent on internet connectivity and service uptime, often at a high per-seat cost.

UserLock takes a different approach. It keeps AD in place and adds the modern security features it's missing, on-premise, no migration required, no ongoing cloud dependency.

Where solutions like Entra ID and Okta are built to replace AD, UserLock is built to work alongside it. Organizations keep AD as their primary identity system while gaining MFA, SSO for SaaS apps (including Microsoft 365, AWS, and Salesforce), and real-time user monitoring.

MFA is essential today. If AD were built now, it would include it out of the box. It doesn't, organizations are expected to find and set up their own solution.

UserLock: Acts as an authentication overlay between AD and the user. Admins set MFA policies on the UserLock server. When users log into a Windows system, they're prompted with their chosen MFA method: QR code, push notification, TOTP, or security key.

Connecting AD to cloud apps requires tools like ADFS and Entra Connect Sync, extra infrastructure that adds both cost and complexity.

UserLock: UserLock SSO acts as an on-premise IdP, letting organizations authenticate to SaaS applications without moving users to a cloud IdP. On-premise AD does the job.

AD has no way to track user sessions across devices or connections. Concurrent sessions, logging into multiple apps or servers from one account simultaneously, are a serious risk. They encourage credential sharing, make anomalous behavior harder to spot, and give attackers more room to move.

UserLock: Analyzes sessions in real time, identifies parent sessions, and enforces pre-defined security policies. When a user tries to open a concurrent connection, admins can block it, force a logoff, or auto-lock existing sessions.

AD treats access as binary: allowed or denied. In a world where users log in from multiple locations, that's severely limiting. Admins are stuck choosing between accepting risky logins or blocking legitimate ones entirely.

UserLock: Admins can set granular access policies based on user, group, OU, device, IP address, time of day, and session type (VPN, IIS, Wi-Fi, UAC events).

Admin accounts are a prime target for attackers, and over time, those privileges tend to multiply and sprawl. They're not always well-secured, and attackers know it.

UserLock: Admin access is tightly controlled. Access can be conditional or set as temporary, and privilege elevation triggers additional authentication. Admin accounts stop being an all-or-nothing "god mode."

Visibility into user behavior is core to network security, but AD doesn't provide it. If something unusual is happening, admins may not know until it's too late. Native AD logging also falls short of most compliance requirements.

UserLock: The UserLock dashboard gives admins a real-time view of user sessions, with built-in risk indicators. Disabled or locked account attempts, mid-session credential switches, repeated access denials, all of it surfaces automatically. No digging through logs required.