Question : Problem: Microsoft DPM 2007 Client Installation Problems

I have a Windows 2003 Storage Server SP2.  Using the DPM Agent Install feature I successfully installed DPM agent on 3 of my 4 servers.  The problem server will not let me install DPM 2007 using this utility.  The server runs 2k3 sp2 and it's primary role is a BDC and houses various public folders.

When I attempt to install the agent onto the computer I get the following message:  The user administrator does not have administrator access to the following items; (ID:271)
Remove the computers from the "Select Computers" page or provide credentials for an account that has administrator access to all of the selected computers.

I have verified that all of the prerequisetes are installed and configured properly.

Also, I tried to install the agent manually on the server following this link exactly
http://technet.microsoft.com/en-us/library/bb870935.aspx

When attaching the agent from the DPM server I received the following error message:

There is failure while attaching production server
c:\Program Files\Microsoft DPM\DPM\bin\Attach-ProductionServer.ps1 : When trying to retrieve information from the Windows Management Instumentation service on , access was denied.

I verified that the WMI services were started.

{{{Firewall is disabled}}}

Answer : Problem: Microsoft DPM 2007 Client Installation Problems

Ok here is what I did to resolve my problem:

Note: Corpserver2 was the problem server.
          Corpserver5Nas1 is the DPM 2007 Server

Below is a detailed description of the error:
- Ran the following command on CORPSERVER2
  SetDpmServer -dpmservername PROPSERVER5NAS1
- On the DPM Server, ran the following command from DPM Shell
 
  PS C:\Program Files\Microsoft DPM\DPM\bin> .\Attach-ProductionServer.ps1
  DPMServer:: corpserver5nas1
  PSName:: corpserver2
  UserName:: administrator
  Password:: ********
  Domain:: corp.hitchcocks
  There is failure while attaching production server
  C:\Program Files\Microsoft DPM\DPM\bin\Attach-ProductionServer.ps1 :
  When trying to retrieve information from the Windows Management Instrumentation
  (WMI) service on corpserver2, access was denied.
  At line:1 char:29+ .\Attach-ProductionServer.ps1 <<<< 
 Verify that you have access to the WMI service on corpserver2.
- From DPM Server, ran WBEMTEST.
  Clicked on Connect and typed in \\corpserver2\root\default
  When clicked on connect, got the following error:
 
  --------------------------------------------
  Error                          
 -------------------------------------------
  Number: 0x80070005            
   Facility: Win32                
  Description: Access is denied  
                                 
  Dismiss       More Information  
 -------------------------------------------
 
- Running WBEMTEST from CORPSERVER2 pointing to CORPSERVER5NAS1 gives the same access denied error above.

Resolution:

- Went to DCOMCNFG on CORPSERVER2
  Expanded Component Services -> Computers and right click My Computer and select Properties
  Under Default Properties, "Enable Distributed COM on this computer" wasn't checked.
  Checked and rebooted the server.
- This fixed the problem we were having protecting CORPSERVER2.

Isn't it funny that some of the biggest problems are resolved by putting a check in a box?

Hope this helps anyone having this similar problem!!!