We all have 3rd party vendors and grant them access to parts of our systems, but managing logins can be a real headache. You need to grant access quickly so work can begin, but that often means sharing passwords or creating accounts that never get deleted. It’s the classic trade-off between cybersecurity and convenience, which can easily leave us at risk.
What if you could change that? Imagine granting access with precision and having it revoked automatically, all while making your job easier.
The good news is that you can, and it doesn’t take a week to set up. We’ll show you how to use Entra Conditional Access to create a self-cleaning system for contractor access in roughly sixty minutes. It’s about working smarter, not harder, and finally closing that security gap for good.
What does revoke access automatically mean?
Access revocation is simply the process of disallowing network access to former vendors or employees. Implementing automated access revocation is not just about better cybersecurity, it's a critical component of financial risk management and regulatory compliance. The biggest risk in contractor management is relying on human memory to manually delete accounts and revoke permissions after a project ends.
Forgotten accounts with lingering access, often referred to as ‘dormant’ or ‘ghost’ accounts, are a prime target for cyber-attackers. If an attacker compromises a dormant account, they can operate inside your network without detection, as no one is monitoring an "inactive" user.
Look back at the Target data breach in 2013. It’s a stark illustration wherein attackers gained initial entry into Target's network by compromising the credentials of a third-party HVAC contractor that had legitimate, yet overly permissive, access to the network for billing purposes. If Target had enforced the principle of least privilege, limiting the vendor's access only to the necessary billing system, the lateral movement that compromised millions of customer records could have been contained or prevented entirely.
If you leverage Microsoft Entra Conditional Access to set a sign-in frequency and instantly revoke access when a contractor is removed from the security group, you eliminate the chance of lingering permissions. This automation ensures that you are consistently applying the principle of least privilege, significantly reducing your attack surface and demonstrating due diligence for auditors under regulations like GDPR or HIPAA. It turns a high-risk, manual task into a reliable, self-managing system.
How to reduce third party risk?
While there will always be dangers allowing non-employees into your system, here are a few tips for mitigating those risks:
1: Establish a Security Group for Contractors
Isolating contractors is the first step to taming potential chaos. Organize contractors and apply rules. Go to your Microsoft Entra admin center (formerly Azure AD admin center) and create a new security group with a clear, descriptive name, something like 'External-Contractors' or 'Temporary-Access'.
This new group will become your central control point. Add each new contractor to it when they start and remove them when their project ends. This single step lays the foundation for clean, scalable management in Entra.
2: Create a ‘Set-and-Forget’ Expiration Policy
Set up a policy that automatically handles access revocation for you. Conditional Access does the heavy lifting so you don’t have to. In the Entra portal, create a new Conditional Access policy and assign it to your “External-Contractors” group. Then, define the conditions that determine how and when access is granted or removed.
In the ‘Grant’ section, enforce Multi-Factor Authentication (MFA) to add an essential layer of cybersecurity. Next, under ‘Session,’ locate the ‘Sign-in frequency’ setting and set it to 90 days, or whatever duration matches your contracts. This not only prompts regular logins but ensures that once a contractor is removed from the group, they can no longer re-authenticate, automatically locking the door behind them.
2: Give Contractors ONLY the Access They Need, Nothing More
Base access on what a contractor actually does. A freelance writer needs access to your content management system, but probably not your financial software. A web developer needs to reach staging servers but has no business in your HR platform. Your next policy ensures they only get the keys to the rooms they need.
Create a second Conditional Access policy for your contractor group. Under ‘Cloud apps,’ select only the applications they are permitted to use, such as Slack, Teams, Microsoft Office, or a specific SharePoint site. Then, set the control to ‘Block’ for all other apps. Think of this as building a custom firewall around each user. It’s a powerful way to reduce risk, applying the principle of least privilege: give users access only to the tools and permissions they need to do their job, and nothing more.
3: Establish Strong Authentication
As a further step to build the best cybersecurity, layer in device and authentication requirements. You are not going to manage a contractor’s personal laptop, and that is okay. However, it is your business what systems they will be using, and this means that you get to control how they prove their identity. The goal is to make it very difficult for an attacker to misuse their credentials.
Configure a policy that requires a compliant device, then use the ‘OR’ function to allow access if the user signs in with a phishing-resistant method, such as the Microsoft Authenticator app. This encourages contractors to adopt your strongest authentication method without creating friction, while fully leveraging the security capabilities of Microsoft Entra.
4: Monitor How the System Works for You Automatically
Once configured, contractor access becomes largely automatic, which is a key benefit. When a new contractor joins the security group, they instantly receive the access you’ve defined, complete with all security controls. When their project ends and you remove them from the group, access is revoked immediately and completely, including any active sessions, eliminating any chance of lingering permissions.
Automation removes the biggest risk, which is relying on someone to remember to act. It turns a high-risk, manual task into a reliable, self-managing system, eliminating concerns about forgotten accounts and their security risks, so you can focus on the business work that really matters.
Control Your Cloud Security
The above tips help you manage contractor access without stress or much active tasking. With a little upfront setup in Conditional Access policies, you can create a system that’s both highly secure and effortlessly automatic. Grant precise access for a defined period and enjoy the peace of mind that comes from knowing access is revoked automatically. It’s a win for security, productivity, and your peace of mind.
If you want better control of your contractor access, contact us today to build your own set-and-forget access system.
Frequently Asked Questions
What is Conditional Access in Central?
According to Microsoft:
“Conditional Access policies at their simplest are if-then statements: if a user wants to access a resource, then they must complete an action. For example: If a user wants to access an application or service like Microsoft 365, then they must perform multifactor authentication to gain access.”
What is a red flag for a security clearance?
In terms of access and security clearance, a ‘red flag’ is any behavior, financial issue, or personal circumstance that suggests an applicant may be vulnerable to coercion, exploitation, or compromise. Evaluated under the 13 Adjudicative Guidelines put forth by the National Security Adjudicative Guidelines, the biggest red flags involve dishonesty, financial distress, substance abuse, and criminal conduct.
Is strong authentication the same as MFA?
MFA (Multi-Factor Authentication) is a way of safely and reliably confirming user identity. While it is one of the best options to establish trust with users, actual strong authentication goes beyond MFA or two-factor authentication (2FA). Consider advanced steps such as biometrics (fingerprint or retinal scan).
Can I use a power automaton for access management?
Yes. Power Automate triggers a process for each request created in the Power App. It automates all process inflow and sends notifications on every stage of flow to relevant actors' inactivity.
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