Lync Server 2013 Role: Lync Edge
Base Operating System: Windows Server 2012
You attempt to start your Lync Server 2013’s Edge server’s Lync Server Access Edge service but notice that the service fails with the following message:
Windows could not start the Lync Server Access Edge on Local Computer. For more information, review the System Event Log. If this is a non-Microsoft service, contact the service vendor, and refer to the service-specific error code -2146762487.
Check Event Log
Reviewing the System logs on the Edge server show event ID 7024 errors logged:
The Lync Server Access Edge service terminated with the following service-specific error: A Certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider.
Download the certificate root server certificate for your Access Edge Server, I used GoDaddy cert for my Edge server so from the link below I have downloaded the root server certificate, and this resolved the issue.