How to create an outlook search folder in a pst-archive by means of VBA which scans all folders contained in this archive?

Question

Starting situation:

Outlook 2016 is connected to the mailbox "Name@Domain" and a local "Archive". The mailbox uses IMAP/SMTP and a local OST-file. "Archive" is a local PST-file.

Test job:

Display all elements contained in the mailbox or archive in a search folder named "TEST" which is created using VBA:

Public FlagAdvancedSearchComplete As Boolean

Private Sub Application_AdvancedSearchComplete (ByVal SearchObject As Search)
    FlagAdvancedSearchComplete = True
End Sub

Sub CreateSearchFolder_TEST()

    Dim MyScope  As String
    Dim MySearch As Search

    MyScope = "'\\Name@Domain'"
   'MyScope = "'\\Archive'"

    Set MySearch = Application.AdvancedSearch _
    (Scope:=MyScope, Filter:="", SearchSubFolders:=True, Tag:="MySearchFolder")

    Do While FlagAdvancedSearchComplete = False
        DoEvents
    Loop  

    MySearch.Save ("TEST")

End Sub

Findings:

The VBA-code creates the desired search folder "TEST" in "Name@Domain“ as expected. However, if MyScope = "'\\Archive'" is activated instead of 'MyScope = "'\\Name@Domain‘" execution stops at the line MySearch.Save ("TEST") with the following error message:

Run time error -2147221241 (80040107):
Procedure could not be executed. Object not found.

What needs to be changed in the code in order to make it work with all mailboxes and archives?