My PRTG server is part of an AD domain and i have problems with WMI for workgroup servers that are not part of this domain. No problem with the servers within the domain. I have tried using the WMI test tool and i got the error "8007005:Acess is denied error". i'm using the local administrator account for the credentials.
With the help of the knowloedge based, i have verified that port 135 is open, “ForceGuest” is set to “0” and windows firewall is disabled. Furthermore, i have added the admin account to the DCOM user group and the Performance Monitoring Group. Under the DCOMCNFG, i have check that the DCOM user group has remote launch and remote activtion set to "Allow".
The weird thing is that i can run the query successfully if i execute the tester locally from the client server itself but got the error when launching the tool remotely from another server