There are two versions of the Lync 2010 client, one for x86 and one for x64 operating systems. The difference is the bootloader and the prerequisite software included in the client installer (Microsoft Visual C++ 2008 Redistributable - x86 or x64 and SilverLight). Somewhat surprisingly, the Lync client itself is always 32-bit. If you try to deploy the x86 version of the client on an x64 computer (or vice versa), you will get an error message.
This can be somewhat problematic if you are trying to automatically deploy the Lync client using Group Policy or some other automated scripting mechanism to mixed-architecture computers in your environment.
Note: The Outlook Online Meeting add-on will match the 32- or 64-bit version of Office 2007/2010 installed, regardless of the Lync client architecture installed.
The rest of this article discusses how to run the correct architecture Lync client using a single batch file. This batch file can be called using a computer startup script or a user logon script in Group Policy, or any other automated process.
First, create a network share called Lync Clients for the Lync 2010 client installer packages, with subfolders called x86 and x64. Then copy the x86 and x64 Lync client installers into the proper folder, as shown below.
|Lync Client Share|
If Exist C:\Windows\LyncInstalled.txt Goto ENDAs mentioned earlier, you can then deploy this script via Group Policy or your favorite deployment mechanism. Note that the Lync installer must be run as a user with rights to install software. For this reason, it may be easier to install as a computer startup script. 5:14 PM
If Exist "%SystemDrive%\Program Files (x86)" Set ARCHITECTURE=x64
Echo Time > C:\Windows\LyncInstalled.txt