Solution for "Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed"

When you use MDT you see many times the following error:
"Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed"

Solution 1:
To fix the problem you should edit the ztiutility.vbs file in the deployment share under the scripts folder.  Open the file in notepad and replace the following code in the MapNetworkDriveEX function:

Case Else
‘ Case &h800704C3 ‘ Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed.
‘ Case &h8007052E ‘ Logon failure: unknown user name or bad password.
‘ There was a some kind of fatal error.
If ErrDesc <> "" then
             MapNetworkDriveEx = ErrDesc
Else
             MapNetworkDriveEx = "Unable to map UNC Path " & sShare & " :" & "( 0x" & hex(HasError) & " ) "
End if
oLogging.CreateEntry MapNetworkDriveEx & "", iLogType
Exit function
End select

With this code:

Case Else
Err.Clear
On Error Resume Next
oNetwork.MapNetworkDrive  chr(sDrive)&":", sShare, False
HasError = err.number
ErrDesc = err.Description
On Error Goto 0
If Err.Number <> 0 Then
‘ There was a some kind of fatal error.
             If ErrDesc <> "" then
                                        MapNetworkDriveEx = ErrDesc
             Else
                                        MapNetworkDriveEx = "Unable to map UNC Path " & sShare & " :" &    "( 0x" & hex(HasError) & " ) "
             End if
             oLogging.CreateEntry MapNetworkDriveEx & "", iLogType
             Exit function
Else
      Exit Function
End If 

End select

Solution 2

Download ZTIUtility.7z and replace the ztiutility.vbs with the one in the ZTIUtility.7z. You need 7zip to unpack the file.

http://support.microsoft.com/kb/977566