It looks like I had mycompany.onmicrosoft.com as one of the UPN's in AD from when I very first deployed Office365. I've now removed this so that the only one in there is the mycompany.com UPN. After syncing the onmicrosoft one is still the only one listed, so I'm assuming I have to get that out of there first. Is there a way to sync and fix this, or clear them out and re-do it?
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