Hi @Gaetano Manfredi , Does the environment work if you don't replace the isdeleted entry for the deleted object container CN=Microsoft MTA?
- If not, check the event log for what warnings.
- Please try to restore AD objects again through Power Shell command or AD recycle bin to see if it resolves these warnings.
For reference: How to Enable and Use the Active Directory Recycle Bin.
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3.If you have a backup of AD, you can choose to perform a restore.
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