We migrated many users from R1 to R2 but 2 users cannot be migrated. The following is the error message for your reference. Would you please advise? Thank you.
“User entry update in Active Directory failed while moving user. (0) User: Lastname, Firstname Error: 0xC3F75801 Cause: Domain controller may be unreachable. Resolution: Please retry the move operation after fixing the Active Directory permission and access issues.”
you should have a look to the security settings of the user you want to migrate (compare security settings of user account with settings for a account which could be migrated). Within Domain Prep of OCS R2 there where special rights created on the Domain OUs (Groups RTC* get a few rights). Normally, if inheritance is enabled, this security settings should be applied to all Accounts. If inheritance is not enabled, the needed rights are may be missing, so there is a permission issue for migration.