Client does not upgrade or install, The handle is invalid, return code 6.
Client does not upgrade or install
The SLBOOST.log or the SLtrace.htm client log files show:
RESULT: 6=The handle is invalid
Return Code:  The handle is invalid
The Administrative service on the Domain Controller is not able to correctly assist with the upgrade/install administrative task on the client.
Please verify that the domain user service account (DAUSER) that is being used by the Administrative service is not a member of the Local Administrative group on the client, either explicitly or implicitly. If it is, remove it from the Local Administrative group, or use a different domain user service account in the Administrative service.
The domain user service account (DAUSER) used by the DA Administrative service cannot be a member of the Domain Administrative group or the Local Administrative group, either on the client or the server that the Administrative service is installed on.