Error: “does not have a valid ExchangeGuid property and cannot be migrated”

Problem vid crossforest migration

Kör get-mailbox <mailbox> | select exchangeguid i sourceforest.

Kopiera värdet för Exchangeguid till target med:

Get-MailUser jorbus | Set-MailUser -ExchangeGuid <Exchangeguid>

För samma problem med migrering till Office365 se:

https://support.microsoft.com/en-us/help/2956029/migrationpermanentexception-cannot-find-a-recipient-that-has-mailbox-g