Hello,
I am migrating exchange 2003 to Exchange 2007 and have moved almost all the mailboxes without any issue, but there are some mailboxes which are not being moved since they are giving me the below error.
Error:
Error was found for John Doe (johndoe@ah.com.sa) because: Error occurred in the step: Opening source mailbox. Failed to open mailbox with error: ClassFactory cannot supply requested class, error code: -1056749262
Initially I found that the account was disabled from Active Directory so enabled it but and also replicated the active Directory but still the problem is there, its not hidden in the GAL aswell.
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