Problem Assigning Certificate to Service in Exchange 2010 Server

Howdy all,

Some people facing Problem when they are assigning a certificate to the UM-Service. the error is like this


To solve this problem it’s really easy if you didn’t get it from the Error

– In EMC, go to Server Configuration and Click on “Unified Messaging Server”, then Right Click your UM-Server and select Properties.

– Go to “UM Settings” Tap.

– in the “Startup Mode” drop menu select “TLS”

– Click Apply then Ok.


This Should be enough to solve your Problem 🙂



Author: Lyncdude

A Senior Service Engineer with more than 9 years of experience in Microsoft Exchange and Microsoft Lync Server / Skype for Business. Egyptian guy lives and works in Frankfurt - Germany. what is written in this blog is my own opinion and thoughts, not my employer and does not reflect their opinion

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