Unknown Guest Contributor in SharePoint Online

Copper Contributor

Hello,
I have discovered that a "Guest Contributor" has edited a file in a customer's SharePoint Online.
We suspect that this "Guest Contributor" has unauthorized access.

 

Is there any way to find out more about this user e.g. logs etc.?

I can only find a generic ID when I open the user in SharePoint.2024-01-30 13_45_20-Personal Settings — Mozilla Firefox.pngnt. I have already searched in vain in Entra ID.

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