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 Microsoft Unified Communications Consultant 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. Worked Closely with Microsoft Dubai for 3 years designing , building and supporting Exchange and Lync Infrastructures. A Microsoft Certified ITP in Lync, Exchange and also attended Microsoft Partner Primer Filed Support Engineer T1 Training for Microsoft Lync 2010.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s