Hi @IvanK,
Thank you for reaching out to Microsoft Q&A Support
As a forum moderator, after overviewing your concern, I can say that your case is quite advanced. With the resources currently available to me, my primary recommendation would be to leverage the Audit Log functionality, which you can access via either Microsoft Purview or the Microsoft Defender Portal. For more detailed guidance on this, please refer to the following documentation
Link articles:
- Via Defender: Audit log search in the Microsoft Defender portal - Microsoft Defender for Office 365 | Microsoft Learn
- Via Purview: Search the audit log | Microsoft Learn
Once you've accessed the Audit Log interface, you can proceed to configure the specific audit settings. For your case, we recommend selecting 'Installed app in Microsoft Teams' under the 'Activities - friendly name' section
However, if after reviewing the Audit Log results, they don't provide the level of detail you're looking for, we would then recommend posting your question in the Microsoft Graph - Q&A section. You may be able to receive more specialized assistance there.
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