For direct routing, each MS Teams user is associated with a Voice Routing Policy. For dialing that has matched an entry in the user's dial plan, MS Teams checks the resulting translation for matches against voice routes.

Each voice routing policy can list more than one PSTN usage. When matching outgoing calls to voice routes, MS Teams only considers routes that have a usage that matches a PSTN usage in the voice routing policy.

MS Teams checks the different usages for a matching voice route in the order that the voice routing policy lists the usages. MS Teams checks all the voice routes with the same usage for a match, using their dial pattern and priority settings.

The Global Policy

Each tenancy in MS Teams has a default global voice routing policy. MS Teams applies the policy to the dialing of all users who do not have an associated voice routing policy.

MS Teams uses the global policy as a template when you add a new policy.

Planning Voice Routing Policies

Decide whether you require separate policies. For example, using policies with different sets of PSTN usage records, you can configure policies for control of local/national/international calling.

• List the types of number for which you require different policies.

• List which users or groups of users need to dial which types of number. Use this to assess whether you should add the PSTN usages to the global dial plan or into separate user dial plans.

• For more details, refer to https://docs.microsoft.com/en-us/microsoftteams/manage-voice-routing-policies.