What needs to be done to make international calls

To make international calls using Exchange Server, you need to ensure that the following steps are completed:

1. Create International Dialing Rules: You must configure international dialing rules on your Unified Messaging (UM) dial plan. This involves creating a .csv file that includes the dialing rules for international calls. Each rule should specify the name, number mask, dialed number, and an optional comment. Example of a .csv file for international dialing rules:

      Name,NumberMask,DialedNumber,Comment
      International,901144*,901144*,international call
      International,901133*,901133*,international call
   

2. Dialing Rule Groups: Ensure that you have created a dialing rule group that includes the international dialing rules. This group must be added to the list of allowed dialing rule groups on the UM dial plan and associated UM mailbox policies.
3. Dialing Authorizations: Make sure that dialing authorizations are enabled on your UM dial plan. This setting allows you to control which users can make international calls.
4. Permissions: Verify that you have the necessary permissions to configure dialing rules and authorize calls for users in the dial plan.
5. Confirm Configuration: After setting up the dialing rules and authorizations, confirm that the UM dial plan is correctly configured and that the users are enabled for UM.

By following these steps, you should be able to make international calls successfully.

References:

• Allow users to make calls in Exchange Server
• Authorize calls for users in a dial plan in Exchange Server