Request/Renewing Skype for Business Server 2015 Certificates

Here are the steps to request or renew certificates in Skype for Business Server 2015. Most of the steps are similar to Lync Server 2010/2013, so to start let’s go to the well-known Deployment Wizard Step 3 and click Run or Run Again (depending on if you are requesting for the first time or renewing the certificates). Now, in Certificate Wizard, we select the… Read more

Deploying SQL Server AlwaysOn Availability Group for Skype for Business Server 2015

In Lync Server 2013, there were requests regarding an alternative to SQL Mirroring for SQL Server High Availability. This was related to the fact that SQL Mirroring was marked as a feature to be removed in future SQL Server versions: This feature will be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work,… 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

Unable to resolve DNS SRV Record – 404 Not Found and 504 Server time-out

This issue might happen with Skype federation (PIC) or OCS/Lync federation. It’s a simple issue, but directly related to an incorrect configuration that we saw some customers doing. Don’t forget that Lync Server has ports requirement so that federation can work correctly. We can check these requirements on the following TechNet article: Port summary – Single consolidated edge with private… Read more

“No match for domain in DNS SRV results” – Federation to additional SIP Domain

We have to be extra careful when we deal with additional SIP domains and we want these domains to be able to communicate to federated partners. Most of the deployments only have DNS records for the main SIP domain, and because of this the federation for the additional domains won’t work. For example, if we have sip.contoso.com and… Read more

Lync doesn’t generate Address Book files and you receive an error 404 when using the Test-CsAddressBookService cmdlet

Some time ago we got a case where a customer said that the users of a single pool couldn’t download Lync Address Book. The error that the users were receiving was: “Cannot synchronize with the corporate address book because the file could not be found.” When testing with the cmdlet Test-CsAddressBookService, the customer received the… Read more

Renewing Lync Server 2010/2013 Certificates

One common thing that is asked by customers is: “How do I renew Lync Server Certificates?” If not asked, then sometimes we get a customer with certificate issues or even with Lync services off because of an error in certificates creation/renew (or even people that forget to renew the certificate). So, moving on, we decided… Read more

Lync Server 2013 Cumulative Update List: January 2019

Since we already have a Lync Server 2010 Cumulative Update List it makes sense to have the same for Lync Server 2013. We can use the Cmdlets described in Lync Server Component Version to know which version is installed. After running Lync Server Update package, not all components will be updated to the latest version – this is a normal… 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