The Microsoft Exchange Unified Messaging service on the Mailbox server has been configured to use the Lync Server A/V Edge ...

The Microsoft Exchange Unified Messaging service on the Mailbox server has been configured to use the Lync Server A/V Edge resources associated with '%1'. Inbound and outbound calls involving users who are located outside the organization might be failing using the current Lync Server A/V Edge resources. The error code returned was %2. Please contact the appropriate administrator and verify that Lync Server A/V Edge is configured correctly and operational.