Can't sign in to Microsoft Teams meeting due to tenant configuration

Question

Microsoft Teams prompts me to log in to join meetings but when I do it attempts to authenticate me against a tenant that I don't have access to. This gives me an error message and I can't join the meeting.

Here's the error text I receive:

Sorry, but we’re having trouble signing you in. AADSTS50020: User account <redacted> from identity provider 'live.com' does not exist in tenant <redacted> and cannot access the application '5e3ce6c0-2b1f-4285-8d4b-75ee78787346'(Microsoft Teams Web Client) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account. __

Troubleshooting details__ If you contact your administrator, send this info to them. Copy info to clipboard Request Id: be6950f8-7520-4bbc-b2af-1feffd1e2400 Correlation Id: 3b3b94df-587d-437d-95cb-980a00bdca8e Timestamp: 2023-04-04T16:10:28Z Message: AADSTS50020: User account <redacted> from identity provider 'live.com' does not exist in tenant <redacted> and cannot access the application '5e3ce6c0-2b1f-4285-8d4b-75ee78787346'(Microsoft Teams Web Client) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account. Flag sign-in errors for review: Enable flagging If you plan on getting help for this problem, enable flagging and try to reproduce the error within 20 minutes. Flagged events make diagnostics available and are raised to admin attention.  

Answer 1

Hi @Dave Miner

Please kindly note that here on Microsoft Q&A forum we mainly focus on questions about Teams for Business. If only the personal account facing this issue, please consider posting in the corresponding Microsoft Community for better help. Thanks for your understanding.

Are you logging in Teams via the default installed version of Teams (Teams for home or small business)?
How to distinguish (refer to the How do I know which version of Teams I'm using? part):

Use Teams for work or school in Windows 11

I would also recommend logging via Teams on the web and see if it can help with this issue.

Organize account: https://teams.microsoft.com

Personal Account: https://teams.live.com/

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