Getting AD Group memebrship from just a username

hOw can I get a user's AD group membership form just his username. All the scripts I have seen require a full LDAP name and in the situation I am in I shan't know which OU a user is a member of.
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You can get the LDAP name from the username. To do that:

First you will get the distinguished name of the user: For that you have to write the function

Public Function UserNameDN(sUserName)
     set oRootDSE = GetObject("LDAP://rootDSE")
   Set oConnection = CreateObject("ADODB.Connection")
   oConnection.Open "Provider=ADsDSOObject;"
   Set oCommand = CreateObject("ADODB.Command")
   oCommand.ActiveConnection = oConnection
   oCommand.CommandText = "<LDAP://" & oRootDSE.get("defaultNamingContext") & ">;(&(objectCategory=User)(samAccountName=" & _
              sUserName & "));distinguishedName;subtree"
   Set oRecordSet = oCommand.Execute
        UserNameDN = oRecordSet.Fields("distinguishedName")
        If Err <> 0 Then
          outFile.WriteLine "There was an error getting the DN for " & strUser & "." & "    " & Err.Num
          strBadCount = strBadCount + 1
        End If
        On error Goto 0

And after you find the DN name the LDAP name would be
LDAP://DC Name/UserNameDN

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Use dsquery and dsget:

dsquery user -name USERNAME | dsget user -memberof

the only variable is USERNAME...put in the username of the person you want.  So for Joe Smith:

dsquery user -name "Joe Smith" | dsget user -memberof
cescentmanAuthor Commented:
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Windows Server 2003

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