Doug Deitterick's Blog

Information about Skype for Business, Lync, OCS, and Exchange UM.

June, 2012

  • Issues with MRAS and Limited External Calling

    This week I ran into two interesting issues, both around MRAS and the clients displaying Limited External Calling. So what is MRAS anyway? MRAS (Media Relay Authentication Service) is a service on the Edge Server that is responsible for providing credentials...