Multiple Users Experiencing Below Error: Error executing user job updates to Active Directory.
"Unable to find contact object matching SMTP address 'firstname.lastname@example.org'. at BinaryTree.DirSync.Exchange.ADEndpoint.CutoverTargetMailbox(DirSync_UserJob job, ADRequests requests)"
Perform the following steps to resolve this issue
1. Locate the missing contacts in the target and edit the USN value (update description or any other fields for the target contact AD object and save it then remove it again if you like, this action will increment the USN value)
2. Run AADC to sync those changes/adds to the cloud (O365)
3. Re-run a delta Discovery to add those contacts into the back-end SQL DB
4. Retry cutover post above steps.