Hi Teams Community,
We're back with another great addition from RuiTabaresMsft to Support Diagnostics for Microsoft Teams. We're excited to share a new test now available in the Microsoft Remote Connectivity Analyzer — the Guest Invite to Team diagnostic.
Getting guest access working properly in Teams requires several settings across Microsoft 365 to all line up correctly, and when one of them is misconfigured it can be frustratingly difficult to pinpoint. This new diagnostic is designed to help admins quickly identify exactly where the configuration has gone wrong.
If you're experiencing any of the following symptoms, you should give this diagnostic a try:
- A team owner is unable to add or invite a guest user to a Microsoft Team.
- Guest invitations appear to go out, but the guest is never added to the team.
- You receive an error such as "You don't have permission to add guests" when attempting to invite an external user.
- Guest access appears to be enabled in the Teams admin center, but external users still can't join a team.
- Guest users were previously able to be invited to teams, but invitations have stopped working after a recent configuration change.
To access the new diagnostic, navigate to Microsoft Remote Connectivity Analyzer, select Microsoft Teams, then click on Guest Invite to Team.
We recommend signing in with a Teams or Microsoft 365 Administrator account. Because this diagnostic validates tenant-wide settings and Microsoft 365 group configuration, admin-level credentials are needed to return complete and accurate results.
At a high level, the test checks a couple of things:
- Tenant guest access setting — Validates that "Allow guest access in Teams" is enabled in the Teams admin center.
- Microsoft Entra ID external collaboration settings — Confirms B2B external collaboration is not blocked at the Entra ID level.
- Microsoft 365 Groups guest settings — Checks that group owners are permitted to add external people as guests.
- Team ownership — Verifies the team has at least one owner, as required to invite guests.
For background reading:
- Guest access in Microsoft Teams
- Collaborate with guests in a team
- Manage guest access in Microsoft 365 Groups
Please give the new diagnostic a try — and let us know if it helped!
Thanks! Microsoft Teams Support
Microsoft