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O365 Directory Sync errors

I have a directory sync error for 2 users. It looks like at one point the two users had the same smtp address (no idea how) of jjoseph@domain.com. They currently do not. I verified by running this command via powershell and I see the two users have unique SMTP addresses.

Get-ADUser -Identity 'userSAM' -Properties ProxyAddresses | select -ExpandProperty ProxyAddresses

Anyways, I'm still seeing the accounts in the portal as a sync error. I can't seem to figure out how to get it to remove the error. Syncing occurs multiple times a day and the error has been there for a few months. I have fixed other issues in our AD and after a sync errors dissapear but I can't seem to figure this one out. Thank you.

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Mahesh

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Felix Grushevsky

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jbla9028

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Thank you for your help. After digging deeper the issue was that one user had a UPN of JSMITH@domain.com and his email address was JRSMITH@domain.com on his AD account. There was another user who's UPN was JUSTINSMITH@domain.com but his email address was JSMITH@domain.com so there was some sort of confict. I guess a UPN needs to be unique as well as it cannot be used elsewhere for an SMTP Address.