Security Policy Errors

How to Add an External Guest User to a Microsoft 365 Tenant

Maira Mehtab Sep 22, 2026 868 views

Question details

The user needs to invite an external user as a guest so they can access protected Microsoft 365 tenant resources, such as applications or Teams conversations.

Product: Microsoft 365
Device & OS: not provided
Scenario: Collaborating with external partners or clients who need access to internal Microsoft 365 tenant applications and resources.
Observed behavior: The external account cannot access the tenant resources until an administrator sends a guest invitation and the user accepts it.

Before you start

Ensure you are signed in with a Global Administrator or Entra ID Administrator account, and verify that your tenant's external collaboration policies allow guest invitations.

Solution 1Recommended

Invite a Guest User via the Microsoft 365 Admin Center

This is the standard administrative method for sending a guest invitation to an external user's email address.

By adding a user to the directory as a guest, you grant them secure access to specific resources without creating a new internal account. The invited user will receive an email and must accept the invitation using their own credentials.

Open the Microsoft 365 Admin Center

Navigate to Guest Users

In the left-hand navigation menu, expand the 'Users' section and click on 'Guest users'.

Add a Guest User

Select 'Add a guest user' from the top menu, which may prompt you to choose 'Invite user' within the Microsoft Entra ID (Azure) interface.

Enter External User Details

Provide the external user's email address and any other required profile information, then click the button to send the invitation.

Accept the Invitation

Instruct the external user to check their email inbox, open the invitation link, and accept it to gain access to the shared Teams conversation or application.

Guest Access Blocked?: If you receive an error when sending the invitation or if the user cannot access the resource, review your tenant's external collaboration settings and application access policies in Entra ID.

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Frequently Asked Questions

Why can't I send a guest invitation in Microsoft 365?

If you are unable to send an invite, your account might lack Global or Entra Administrator privileges, or your tenant's external collaboration policies may be configured to block guest invitations.

Does an external guest user need a Microsoft 365 license?

No, external guest users do not require a separate license from your organization to access shared resources like Teams conversations or specific applications.

How do I remove an external guest user from my tenant?

Administrators can remove a guest user by navigating to the Microsoft 365 Admin Center, selecting 'Users' > 'Guest users', choosing the specific user, and clicking 'Delete a user'.

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