During the deployment or the attaching of agents you might run in to the error below.
Unable to connect to the Active Directory Domain Services database.
Make sure that the DPM server is a member of a domain and that a domain controller is running. Also verify that there is network connectivity between the DPM server and the domain controller.
ID: 7 Details: Unknown error (0x80005000) (0x80005000)
There is a knowledge database article for a issue like this:
Resolution for Error ID: 7To resolve this error, change the Authenticated Users group so that it has read permissions for the organizational unit that the target server is a member of. To do this, follow these steps:
Alternative cause to this issue
The error code Unknown error (0x80005000) (0x80005000) points to another cause.
In this case the issue was caused by a slash in the OU Name the The target machine to install the DPM agent on was in an OU named "DR/ test Servers." DPM doesn't understand special characters in active directory, so the / was what tripped it up. When you rename the OU, you should be y able to install the agent.