Extracting appointments from shared Outlook calendar to Excel

I am trying to extract appointments from a shared Outlook calendar to Excel using a VBA macro in Excel. The code fails whether I try to define objOwner and olFolderCalendar as either Object or Outlook.Recipient / Outlook.Folder for use in the GetSharedDefaultFolder method.

I get the Run-time error '13': Type mismatch error on the following line:

Set olFolder = olNS.GetSharedDefaultFolder(objOwner, olFolderCalendar)

What am I doing wrong?

Sub ListAppointments()

Dim olApp As Object
Dim olNS As Object
Dim olFolder As Object
Dim olApt As Object
Dim objOwner As Object
Dim olFolderCalendar As Object

Dim NextRow As Long

Set olApp = CreateObject("Outlook.Application")

Set olNS = olApp.GetNamespace("MAPI")

Set objOwner = olNS.CreateRecipient("test@test.com")

objOwner.Resolve

If objOwner.Resolved Then

    MsgBox objOwner.Name
    Set olFolder = olNS.GetSharedDefaultFolder(objOwner, olFolderCalendar)

End If

Range("A1:D1").Value = Array("Subject", "Start", "End", "Location")

NextRow = 2

For Each olApt In olFolder.Items
    Cells(NextRow, "A").Value = olApt.Subject
    Cells(NextRow, "B").Value = olApt.Start
    Cells(NextRow, "C").Value = olApt.End
    Cells(NextRow, "D").Value = olApt.Location
    NextRow = NextRow + 1
Next olApt

Set olApt = Nothing
Set olFolder = Nothing
Set olNS = Nothing
Set olApp = Nothing

Columns.AutoFit

End Sub