An account with the same name exists in Active Directory. Re-using the account was blocked by security policy.

01:40 11/12/2024

Add users or groups to the Allow permission Add the accounts that pre-created the computer accounts in Active Directory If you previously enabled the NetJoinLegacyAccountReuse registry key, disable it on the member computer by deleting the key or setting the value to 0 HKLM\System\CurrentControlSet\Control\LSA\NetJoinLegacyAccountReuse