One example of Lync Login Error Resolution

Lync Logon Error, prompt for Lync Server not found in the domain, there may be a problem with your domain's domain Name System (DNS) configuration, please contact your support team.

650) this.width=650; "title=" image "style=" border-left-0px; border-right-width:0px; Background-image:none; border-bottom-width:0px; padding-top:0px; padding-left:0px; margin:0px; padding-right:0px; border-top-width:0px "border=" 0 "alt=" image "src=" http://s3.51cto.com/wyfs02/M00/82/AE/ Wkiol1deehfymbdpaaddl0z7klk983.png "width=" 405 "height=" 720 "/>

Before all normal, check the front-end server, found that the front-end all services are not started, a check, found that the certificate expired, re-request the certificate, all services are normal, but the client is still prompt this.

It was later remembered that this time the certificate expired, the root certificate was expired, re-renewed the root certificate on the certification authority, and then requested the front-end server certificate.

So, is the client also the same as a certificate issue?

650) this.width=650; "title=" image "style=" border-left-0px; border-right-width:0px; Background-image:none; border-bottom-width:0px; padding-top:0px; padding-left:0px; margin:0px; padding-right:0px; border-top-width:0px "border=" 0 "alt=" image "src=" http://s3.51cto.com/wyfs02/M01/82/B0/ Wkiom1ded2jydxniaadfuzkxfrc160.png "width=" 559 "height=" "/>"

First, whether or not, re-download the root certificate, import re-test

650) this.width=650; "title=" image "style=" border-left-0px; border-right-width:0px; Background-image:none; border-bottom-width:0px; padding-top:0px; padding-left:0px; margin:0px; padding-right:0px; border-top-width:0px "border=" 0 "alt=" image "src=" http://s3.51cto.com/wyfs02/M01/82/AE/ Wkiol1deehmci9hiaaddpnybrog223.png "width=" 560 "height="/>

Check if the front-end service is healthy

650) this.width=650; "title=" image "style=" border-left-0px; border-right-width:0px; Background-image:none; border-bottom-width:0px; padding-top:0px; padding-left:0px; margin:0px; padding-right:0px; border-top-width:0px "border=" 0 "alt=" image "src=" http://s3.51cto.com/wyfs02/M02/82/AE/ Wkiol1deehvhqhfwaahqabcvwjo944.png "width=" 598 "height=" 283 "/>

Check the client to the front 443, 5061 port is normal, and then try to log on, login success, problem resolution. It seems that the main problem is that the Certificate Authority root certificate expires, which causes both the server certificate and the client certificate to expire. Because this client is not added to the domain, when the root certificate is renewed, the client does not automatically download the root certificate and needs to be updated manually.

650) this.width=650; "title=" image "style=" border-left-0px; border-right-width:0px; Background-image:none; border-bottom-width:0px; padding-top:0px; padding-left:0px; margin:0px; padding-right:0px; border-top-width:0px "border=" 0 "alt=" image "src=" http://s3.51cto.com/wyfs02/M00/82/AE/ Wkiol1deehvjibvzaadjy-qj8eo384.png "width=" 407 "height=" 714 "/>

One example of Lync Login Error Resolution