Re: MSexchangeIS / Error 5001 / Microsoft Exchange Information Store service encountered a corrupt AD ob

BemmelenPatrick The archive mailbox is transferred to Office 365 and works fine. I have checked it.

So the migration has been good. But the event viewer mentioned for every mailbox that has been migrated this message. 
So I think that when the handover take place, this message occur.  I got this from every account that I migrated.