ERROR_SPECIAL_USER Error: 1373 Posted on by Webmaster IT Support Forum › Forums › Active Directory › Troubleshooting › ERROR_SPECIAL_USER Error: 1373 Tagged: Error 1373, ERROR_SPECIAL_USER This topic contains 0 replies, has 1 voice, and was last updated by Webmaster 1 year, 8 months ago. Author Posts June 22, 2015 at 3:24 pm #1162 WebmasterKeymaster ERROR_SPECIAL_USER Error: 1373 (0x55D) Cannot perform this operation on this built-in special user. Error 1373 occurs because you are trying to perform an operation that cannot be done against a built-in user account. To work around this, create a new user and apply the operation against the new user. Author Posts You must be logged in to reply to this topic.