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<h2 class="wp-block-heading"> Web Conferencing Server connection failed to Establish on Edge server </h2>



<h3 class="wp-block-heading"><br>In an environment of a domain with a backup DC you might face a problem with Lync Edge deployment.</h3>



<p>After the step where you have to add the CA authority certificate to your Trusted CA store in Edge Server you might ;notice ;</p>
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<p>some errors with Edge server trusting the connection from Front end or vice versa.</p>



<p>The problem will happen if there&#8217;s two CA certificates in the Trusted CA store and you only have imported one of them.</p>



<figure class="wp-block-image"><a href="http://old.moh10ly.com/blog/VoIP/lync/edge-server/lyncedge01.png?attredirects=0"><img src="http://old.moh10ly.com/_/rsrc/1431547307873/blog/VoIP/lync/edge-server/lyncedge01.png" alt=""/></a> 

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</figure>



<p>Looking at the Front End server Certificate store which is joined to the Domain. We still need to dig more to make sure the certificate chain is fully installed.</p>



<figure class="wp-block-image"><a href="http://old.moh10ly.com/blog/VoIP/lync/edge-server/lyncedge02.png?attredirects=0"><img src="http://old.moh10ly.com/_/rsrc/1431547307873/blog/VoIP/lync/edge-server/lyncedge02.png" alt=""/></a></figure>



<h2 class="wp-block-heading"><strong>Errors might be generated by the same symptom are:</strong></h2>



<p>Web Conferencing Server connection failed to establish.</p>



<p>Over the past 1 minutes Lync Server has experienced incoming TLS connection failures 1 time(s). The error code of the ;last</p>



<p>Failure is 0x80090325 (The certificate chain was issued by an authority that is not trusted. ) and the last connection was from the host &#8220;&#8221;. </p>



<h2 class="wp-block-heading">Cause: </h2>



<p>This can occur in case the box is not properly configured for TLS communications with remote Web Conferencing Server. </p>



<h2 class="wp-block-heading"><strong>Resolution:</strong></h2>



<p>Check your topology configuration to ensure that both this host and remote Web Conferencing Server can validate each other TLS certificates and are otherwise trusted for communications.</p>



<p>&#8212;</p>



<p>The XMPP Translating Gateway Proxy has no connections to any XMPP gateways.</p>



<p>Cause: Connectivity issue.</p>



<h2 class="wp-block-heading"><strong>Resolution:</strong></h2>



<p>Check that a configured gateway is running.</p>
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<p>&#8212;</p>



<p><strong>TLS outgoing connection failures.</strong></p>



<p>Over the past 1 minutes, Lync Server has experienced TLS outgoing connection failures 1 time(s). The error code of the last failure is 0x80090325 (The certificate chain was issued by an authority that is not trusted.) while trying to connect to</p>



<p>the server &#8220;EGELYNCFE.domain.local&#8221; at address [192.168.16.45:5061], and the display name in the peer certificate is &#8220;Unavailable&#8221;.</p>



<p>Cause: Most often a problem with the peer certificate or perhaps the host name (DNS) record used to reach the peer ;</p>



<p>server. Target principal name is incorrect means that the peer certificate does not contain the name that the local server used to connect. </p>



<p>The root certificate is not trusted error means the peer certificate was issued by a remote CA that is not trusted by the local machine.</p>



<h2 class="wp-block-heading"><strong>Resolution:</strong></h2>



<p>Check that the address and port matches the FQDN used to connect, and that the peer certificate contains this FQDN ;</p>



<p>somewhere in its subject or SAN fields. If the FQDN refers to a DNS load balanced pool then check that all addresses ;</p>



<p>returned by DNS refer to a server in the same pool. For un-trusted root errors, ensure that the remote CA certificate chain is installed locally. If you have already installed the remote CA certificate chain, then try rebooting the local machine.</p>



<h2 class="wp-block-heading"><strong>Resolution:</strong></h2>



<p>To Resolve this problem, make sure that you export both CA from Front End and import them in to Edge&#8217;s Trusted root ;</p>
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<p>CA Local store.</p>

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