The Lync Server Audio/Video Authentication service on Local Computer started and then stopped.

Issue: Unable to Start Lync Server Audio/Video Authentication service.

Error: The Lync Server Audio/Video Authentication service on Local Computer started and then stopped. Some services stop automatically if they are not in use by other services or programs.

Problem statement:

Basically there are five main services, Lync Server Access Edge, Lync Server Audio/Video Authentication, Lync Server Audio/Video Conferencing, Lync Server Web Conferencing and Lync Server Replica.

When you start Lync Server Audio/Video Authentication services, you will see above error. This error is because of Certificate which has not assigned to Lync Edge pool server.

Resolution:

Follow the below steps: - Assign the internal edge pool certificate to the “Lync Server Audio/Video Authentication” by using Lync PowerShell.

1.     Run the following command to get the certificate thumbprint.

Get-CsCertificate

In result see the internal certificate, which issued by your Organization Certification Authority (CA).

OR

You can open MMC and add certificate in personal you will see the certificates; you need to see internal certificates. In details tab you will see thumbprint. 

2.     Use this command in Lync Server Management Shell:

Set-CSCertificate-Type AudioVideoAuthentication -Thumbprint 9ABCDEFyourINTARNALthumbprintkey654321 –Verbose

Thank you.