The address ‘LyncEnterprise-ApplicationAccount@…’ isn’t a valid SMTP address

Integrating Lync Server 2013 and Exchange 2013 is usually a relative straight forward process. We just need to follow the steps described here: Integrating Microsoft Lync Server 2013 and Microsoft Exchange Server 2013 https://technet.microsoft.com/library/jj688098.aspx One of these steps is to run the script Configure-EnterprisePartnerApplication.ps1 on a Exchange PowerShell. This script will create a User and the Lync Server … Continue reading The address ‘LyncEnterprise-ApplicationAccount@…’ isn’t a valid SMTP address

Lync/SfB Server: Event 31137,31138 LS Response Group Service

These are common warnings and usually associated with issues such as disabled AD account or user removed from Lync Server: Log Name: Lync Server Source: LS Response Group Service Date: 22/12/2014 19:32:15 Event ID: 31137 Task Category: (2001) Level: Warning Keywords: Classic User: N/A Computer: ************ Description: During the Active Directory update non-SIP enabled agents were … Continue reading Lync/SfB Server: Event 31137,31138 LS Response Group Service

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

Certificate re-key to change signature algorithm in Lync Server (SHA-1 to SHA-2)

Recently, I received an e-mail from GoDaddy asking to renew older certificates which were signed using SHA-1 algorithm because: Google® is making a shift in their Chrome™ Web browser to phase out any SSL certificates which use an old encryption algorithm (SHA-1) and expire after Dec. 31, 2015 By default, all new or recently renewed certificates … Continue reading Certificate re-key to change signature algorithm in Lync Server (SHA-1 to SHA-2)

Blocking Calls on Lync Server and Skype for Business Based on Caller ID

Update 2016/04/01 - To avoid Missed call notifications check Missed call notification when the call is blocked by CallerIDBlock MSPL Script Last week a customer asked how we can block calls in Lync Server. After some searching, I found the following post: VoIPNorm's UC Blog - Blocking Calls in Lync Based on Caller ID Unfortunately, the comments refer … Continue reading Blocking Calls on Lync Server and Skype for Business Based on Caller ID

Lync/SfB Edge Server on a single subnet

The point of this post is to help those that can't have 2 NIC on 2 separated not routable subnets. I have already encountered some customers whose security team stated that it was technically impossible to deploy an additional subnet on their current security/network infrastructure. Many of you know that Lync Edge Requirements have the following … Continue reading Lync/SfB Edge Server on a single subnet

Installing private CA root certificate on iOS devices

This isn't related to Lync or OCS, but we see people having a hard time to install root CA certificates on iOS devices (iPhone/iPad). While it's recommended to use public certificates for Lync Mobility, sometimes we are just doing some tests to show to decision makers. Another case is a company that only deployed Lync … Continue reading Installing private CA root certificate on iOS devices

Difference between Open and Closed Federation in Lync/SfB Server

One of the features that Lync Server and Skype for Business Server has and customers like is the ability to federate with another company. This post will focus only on Lync/SfB to Lync/SfB or Lync/SfB to OCS federation. Usually, Lync/SfB administrators don't know if they have an open or closed federation – why is that so? Because … Continue reading Difference between Open and Closed Federation in Lync/SfB Server

EnableFastFailoverTimer in Lync Server 2013 Trunk Configuration

New stuff has been added to Lync Server 2013 but some things aren't visible right away. On the Lync administrator side the interface didn't change much – Control Panel and Topology are almost the same, and PowerShell is still black. "Under the hood", we will find out that things are quite different – new settings, new … Continue reading EnableFastFailoverTimer in Lync Server 2013 Trunk Configuration

Persistent Chat: Your chat room access may be limited due to an outage.

One of the new features in Lync 2013 is the Persistent Chat. Maybe not everyone will deploy this, but nonetheless it's a great feature. Persistent Chat is basically a group chat that we can collocate in the Front End Server. In my lab I was discovering new settings and policies, and after a while I … Continue reading Persistent Chat: Your chat room access may be limited due to an outage.