Cannot access the link of share power point

Hi @Kim,

The error AADSTS50020 usually means the account you’re using doesn’t exist in the tenant that owns the shared file.

This often happens when:

• You’re signing in with a different account than the one the file was shared to
• Your account hasn’t been added as a guest in that tenant
• The invitation (if any) hasn’t been accepted yet

You can try:

• Open the link in an Incognito/ InPrivate window
• Sign in with the exact email that received the file
• Sign out of other Microsoft accounts to avoid conflict

If it still doesn’t work, you’ll need the file owner (or their admin) to:

• Add your account as a guest user
• Grant access to the file again

Microsoft has a quick explanation of this error here: Error AADSTS50020 - User account from identity provider does not exist in tenant | Microsoft Learn

And how to add guest users here: Quickstart: Add a guest user and send an invitation - Microsoft Entra External ID | Microsoft Learn

Hope this information will help.