Managing Microsoft 365 Guest Users Using Graph PowerShell

Collaboration with external users is essential for many modern organizations. Whether you're working with partners, vendors, or contractors, Microsoft 365 Guest Users make it possible to securely share resources and collaborate within Teams, SharePoint, and other M365 services.

Managing these guest users manually, however, can quickly become overwhelming—especially in large environments. That’s where Microsoft Graph PowerShell comes in, offering a scalable way to automate guest user invitations, monitoring, cleanups, and more.

Who are Microsoft 365 Guest Users?

Guest users are individuals outside your organization who are invited to collaborate within your Microsoft 365 environment. These users typically have personal or external corporate email addresses and are granted limited access to resources like Teams, files, and calendars—depending on your policies.

They’re visible in Azure AD (now Entra ID) with a UserType of "Guest" and are managed alongside internal users with a few key differences in permissions and lifecycle handling.

Why Manage Microsoft 365 Guest Users Using Graph PowerShell?

Proper management of guest accounts is essential for:

• 🔐 Security – Prevent stale or unused guest accounts from lingering
• 🧹 Cleanliness – Remove inactive or expired guests
• 📋 Auditing – Track invitation status, sign-in activity, and permissions
• 📈 Scalability – Handle guest lifecycle at scale with automation
• ⏱️ Efficiency – Save hours of manual admin work

Graph PowerShell helps admins create, monitor, update, or remove guest users programmatically—while ensuring consistency and control across the tenant.

Automate Microsoft 365 Guest User Management Using Graph PowerShell

Here are 5 key tasks you can automate using Graph PowerShell, each linked to a complete guide from M365Corner:

• Invite Guest Users to Microsoft 365 Using Graph PowerShell

Quickly onboard one or multiple external users into your M365 environment by sending customized invitations using PowerShell. Ideal for bulk guest onboarding or automated workflows.

👉 Invite guest users to Microsoft 365 using Graph PowerShell

• Monitor Guest User Invitations in Microsoft 365 Using Graph PowerShell

Keep track of who’s been invited, who accepted, and who hasn’t. This script helps you generate a report of pending vs. accepted guest invitations, perfect for follow-ups and audits.

👉Monitor guest user invitations in Microsoft 365

• Identify Microsoft 365 Guest Users Who Haven’t Signed In

Some guest users may be invited but never actually sign in. This script finds inactive guest accounts that have never logged in, allowing you to follow up or disable them for security.

👉Find guest users who haven’t signed in

• Disabling Microsoft 365 Guest User Accounts Using Graph PowerShell

To prevent unused or risky guest accounts from accessing your resources, this script lets you bulk disable guest users based on your criteria.

👉Disable guest user accounts in Microsoft 365

• Managing Guest Users with Graph PowerShell (Create, Read, Update, Delete)

This all-in-one script showcases how to create, retrieve, update, and delete guest user accounts using Graph PowerShell—offering complete control over guest lifecycle.

👉 Manage Microsoft 365 guest users with Graph PowerShell

Final Thoughts

Managing guest users in Microsoft 365 is a critical aspect of maintaining a secure and well-governed tenant. With Microsoft Graph PowerShell and the ready-to-use scripts from M365Corner, you can automate the entire lifecycle of guest users—from invitation to offboarding.

Bookmark this guide and refer to these powerful scripts anytime you need to manage external collaborators effectively and securely.