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Help! Importing X500 into Office 365 post 2007 migration

My Co-Worker has completed the migration steps to move a customer from Exchange 2007 (on old Windows Server) into the 365 platform which is fine however the customer is complaining that calendar appointments etc are getting screwed up. Turns out its because the X500 addresses are not in place.

My co-worker tried to import the X500 addresses as per these instructions:


However when we get to this bit it goes wrong
$user.EmailAddresses+=”X500:/o=VVT/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=useralias”

Powershell throws an error 'EmailAddresses' cannot be found on this object

I am sure its something really simple but I am very much out of my depth with this stuff so please treat me as a complete novice in your replies!

Microsoft OfficeExchangeMicrosoft 365

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Seth Simmons

8/22/2022 - Mon