Sharepoint 2007 Protection error

When you try to add a SharePoint farm to a DPM protection group you may get the error below.

The operation failed because an error occurred while enumerating the data source for Virtual SSP Writer. Check to see that the data source specified in the error message is online and accessible. ID: 921 Details: The system cannot find the path specified (0x8007003)

You will receive this error when trying to expand the SharePoint Front-end server.

Resolution \ Cause:
The might be caused by a missing MTATempStore$ share on your SharePoint frontend server. Check if the directory %program files\Data Protection Manager\Temp is shared as MTATempStore$. The default permission is Everyone full control. This can be changed as long as the account you used for configuring the WssCmdletsWrapper has access to the Share.
Now you can retry to add the SharePoint farm to the Protection group