Clients with older OS X versions 10.5 – 10.8 that wish to use the Lync client may download and install the software using all the default settings by following this link for the Installer/Update from the Microsoft download center web page. (Macintosh users ONLY). Mar 14, 2017 In the Microsoft Lync for Mac 2011 Update volume window, double-click the Lync for Mac 2011 Update application to start the update process, and then follow the instructions on the screen. If the installation finishes successfully, you can remove the update installer from your hard disk.
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If your failure scenario involves a Skype for Business desktop client as the remote endpoint in a chat conversation or AV call, then you should include the logs from the desktop client in your error report.You can view the desktop client logs on your own, but we haven't documented the logging format so you probably won't find resources to make sense of them. Instead, collect the logs and submit them with your bug report.
There are two types of logs available from the desktop client:
For any bugs related to Audio/Video, please attach both log types if possible. For bugs not related to Audio/Video, the .UccApilog files should be sufficient.
On a Windows machine, the logs for a Skype for business desktop client will be located in the following directory:
%LOCALAPPDATA%MicrosoftOffice16.0LyncTracing
The .UccApilog files will have names that look like this:
Lync-UccApi-[[n]].UccApilog where [[n]]should be replaced by a number 0-2.
The .etl media log files will have names that look like this:
Lync-16.0.6965.5305-Office-x86ship-U.etl
On a Mac, the logs are in a similar directory within the root directory where the desktop client is installed.
After reproducing the issue and closing the client, navigate to this directory and select the log file(s) with the most recent timestamp(s). This is the file you should submit with any bug report.