Issue with Presence and IM on Federation when having a side-by-side tenant and Skype for Business on premises deployment

Recently there have been quite a few reports by customers who have issues with Presence and IM while Federating with other organizations. One of the most common scenarios, related to this phenomenon, is tied up with tenants being part of the communication path between the two organizations. Usually, there is a tendency to ignore the… Read more

How to reboot your Lync/SfB Servers without breaking the Quorum.

More than once the situation when I’m asked how we should really reboot a server in a pool minimizing the impact for the end users, and not breaking the Server Quorum, Fabric Service and Routing Groups currently in use. Before proceeding, it’s important to always take in consideration our Technet Article about High Availability. There, you… Read more

Checks to do in the Lync/Skype for Business Server Certificate Store

The checks described in this article are the result of what we normally check during troubleshooting. Some of these already have specific error events, but the objective here is to try to avoid that these events occur. We plan to keep the post updated and add more checks that we identify as useful. Also, we… Read more

Disabling SSL 3.0 in Lync Server 2013 and Skype for Business Server 2015

If you recently tried to check on a certificate on DigiCert – SSL Certificate Checker (https://www.digicert.com/help/), you may have noticed the following warning:   DigiCert added this verification due to a vulnerability that was discovered a few days ago. For more information about this vulnerability, check the following articles: Vulnerability Summary for CVE-2014-3566 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-3566 This POODLE… Read more

Configuring ARR for Lync Server

Sometime ago we got into a situation where a customer deployed ARR as a Reverse Proxy for Lync Server. This was new to us. We found some articles on the Internet showing how to configure it, but none of them were clear enough. We wanted to understand this better, so we configured ARR from zero… Read more