Consegui encontrar uma solução adequada no Stack Overflow aqui. Eu ajustei os dados sendo compilados e acabei com isso como meu sub final no Excel.
Sub GALExport()
Dim appOL As Object
Dim oGAL As Object
Dim oContact As Object
Dim oUser As Object
Dim arrUsers(1 To 65000, 1 To 5) As String
Dim UserIndex As Long
Dim i As Long
Set appOL = CreateObject("Outlook.Application")
Set oGAL = appOL.GetNameSpace("MAPI").AddressLists("Global Address List").AddressEntries
For i = 1 To oGAL.Count
Set oContact = oGAL.Item(i)
If oContact.AddressEntryUserType = 0 Then
Set oUser = oContact.GetExchangeUser
If Len(oUser.lastname) > 0 Then
UserIndex = UserIndex + 1
arrUsers(UserIndex, 1) = oUser.Name
arrUsers(UserIndex, 2) = oUser.PrimarySMTPAddress
arrUsers(UserIndex, 3) = oUser.Alias
arrUsers(UserIndex, 4) = oUser.JobTitle
arrUsers(UserIndex, 5) = oUser.Department
End If
End If
Next i
appOL.Quit
Range("A1").Value = "Name"
Range("B1").Value = "Email Address"
Range("C1").Value = "Network Alias"
Range("D1").Value = "Job Title"
Range("E1").Value = "Department"
If UserIndex > 0 Then
Range("A2").Resize(UserIndex, UBound(arrUsers, 2)).Value = arrUsers
End If
Set appOL = Nothing
Set oGAL = Nothing
Set oContact = Nothing
Set oUser = Nothing
Erase arrUsers
End Sub