Some emails folder on Public Folder disappzar itself

Question

Hi everybody, We are using Public Folders on Exchange Online. 2 times, we have a big part of our mail folders (and all contents) on Public Folders disappear it self. We are facing a big issue because there is a lot of important emails on PF. Hopefully, we have a backup coming from the time we used local Exchange (onpremise) Someone can help me to understand what's happening. How can I get logs or everything to know why we have some mail folders disappear it self. Many thanks

Answer 1

@konaté samba

First, you can check with Office 365 retention policy, whether there exist retention policy to delete items from folder automatically. Create and configure retention policies .

However, retention policy will only delete content will not delete folder. So, you can also try to modify public folder permission(Remove delete permission from all users, only remain delete permission for administrator) for your all existing folders. (Add-PublicFolderClientPermission) If this phenomenon gone after modifying permission, it means those folders were deleted by someone before.

If this phenomenon still exist, you may need to confirm with the Office 365 team to check from backend.

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