Update Set-CsTeamsUnassignedNumberTreatment.md

Author: JensTrier

teams/teams-ps/teams/Set-CsTeamsUnassignedNumberTreatment.md

@@ -161,6 +161,10 @@ The cmdlet is available in Teams PS module 2.5.1 or later.
 
 Both inbound calls to Microsoft Teams and outbound calls from Microsoft Teams will have the called number checked against the unassigned number range.
 
+To route calls to unassigned Microsoft Calling Plan subscriber numbers, your tenant needs to have available Communications Credits.
+
+To route calls to unassigned Microsoft Calling Plan service numbers, your tenant needs to have at least one Phone System – Virtual User license.
+
 If a specified pattern/range contains phone numbers that are assigned to a user or resource account in the tenant, calls to these phone numbers will be routed to 
 the appropriate target and not routed to the specified unassigned number treatment. There are no other checks of the numbers in the range. If the range contains
 a valid external phone number, outbound calls from Microsoft Teams to that phone number will be routed according to the treatment.