Это может быть лучшим подходом:
Sub UploadToSharepoint()
Dim SharepointAddress As String
Dim LocalAddress As String
Dim FS As Object
SharepointAddress = "\\share.deere.com\teams\sm_at_sd\uppcaptracking\Test"
LocalAddress = "c:\blah\blah2\MyWorkFiletoCopy.xlsx"
Set FS = CreateObject("Scripting.FileSystemObject")
If FS.FileExists(LocalAddress) Then
FS.CopyFile LocalAddress, SharepointAddress
End If
End Sub
Не нужно подключать диск.