The user or group name 'BUILTINAdministrators' is not recognized error in SSRS AX 2012 R3 (rsUnknownUserName)
The user or group name \’BUILTINAdministrators\’ is not recognized. (rsUnknownUserName) Error in SSRS AX 2012 R3 Solution: Check or Configure the Business Connector proxy account Click System administration > Setup > System > System service accounts. –or– Open the System service accounts form from the initialization checklist or the upgrade checklist. Use the System service accounts…