Thomas.Poett@TEAMS (MVP Teams and Cross-Tenant Migration Specialist)

I extended the last Lync Stress Test Guide. Version 2.0 Now all important information are provided, incl. all parameters which can be modified and customized around all stress tests. You can download the free eBook here: Microsoft TechNet: http://gallery.technet.microsoft.com/office/Lync-Stress-Test-How-Too-c4c276e1 SlideShare: http://de.slideshare.net/thomaspoett/lync-stress-test-guide-v20-ebook   Table of Content: Introduction The Calculation Process (I can recommend to you): Build the Stress Test Lab The Stress Test Process: The Validation Process: User Provisioning Tool Setup User Provisioning Tool User Creation Contacts Creation Distribution List Creation Location Info Service Config Run Configuration Scripts Stress Test Simulations User Profile Generator Common Configuration General Scenario Voice Scenario Reach Scenario Mobility Scenario Summary (Important User Load definition) Table of Figures Author: Thomas Poett MVP, Managing Consultant

Since Microsoft released Lync Server 2013, there was one change in the planning document. No detailed SPECs were released so you could exactly calculate your server performance requirements. Truly, there is the performance calculation sheet which provides you with a rough overview. For this entire process you need the following tools and documents: Lync Server 2013 Capacity Calculator Lync Server 2013 Stress Testing Guide Lync Server 2013 Stress and Performance Tool Key Health Indicators: The Foundation for Maintaining Healthy Lync Servers Planning a Lync Server 2013 Deployment on Virtual Servers Lync Call Quality Methodology poster I provide you with the Lync KHI Performance Counter: Download here Note: The XML I have provide contains a consolidated Lync Frontend installation entirely on drive C: with 6 CPU core. If you have another setup, please add more CPU counter and if the SQL Server is installed on drive D:, please also add the I/O counters for this drive too.

Solving a conferencing component error. ERROR: LS Data MCU Event ID 41029 Conferencing modality. Server Machine FQDN: lyncfe02.domain.com, Port:8061 Server Type: External-WebApp-Edge [HTTP side error:The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.] If the problem persists this event will be logged again after 20 minutes Cause: Service may be unavailable or Network connectivity may have been compromised. SOLUTION: This issue is related with your WAC, Office Web App Server. Mostly, you need to validate this settings Server FQDN spelling check if WAC Server support only SSL Check your Certificate Deployment on the WAC Server This solves the issue. Author: Thomas Poett MVP, Managing Consultant Microsoft Unified Communication

The SBA is aware of the centrally configured Exchange Unified Messaging component. Additional it is important to understand the process of Voice Mail Survivability. While the VoicemailReroutingConfiguration in Lync provides the SBA with an alternative path, rerouted via PSTN to the central Exchange UM site. The SBA is continuously check the SIP availability of the Exchange UM component, using the SIP OPTION based health checking. (Indeed, both SBA and non SBA Lync registrars act in the same way for all components, e.g. Exchange UM and other Gateway-SBC). Once the SIP OPTION command is sent, the sender expects an SIP 200 OK answer. Lync tries this health check several time even after it do NOT receive a 200 OK. As result of not receiving, the registrar will mark this target as DOWN and stop sending calls. Note: You can drill down this process, if you us OCSLogger and Snooper catching the OPTION and 200 OK communication directly on the SBA. Back to the Exchange UM, if Exchange