Customer case: The customer has added a private line to myself (several days ago) Set-CsPhoneNumberAssignment -Identity user1@contoso.com -PhoneNumber '+1442032576694' -PhoneNumberType DirectRouting -AssignmentCategory Private
He can see the number assigned (and it works), alongside his main number
but in the DN Pool (following a sync and several days wait) can see the primary number but not the private number in use.