You may experience one or more of the following symptoms:
A local Windows Installer (MSI) installation for Microsoft Lync 2010 will not complete, and the following warning is displayed in the Microsoft Lync 2010 Setup dialog box:
Microsoft Lync 2010 must be installed by running the appropriate Lync setup executable
The Active Directory Domain Services (AD DS) Software Installation Group Policy setting for MSI deployment methods will not complete when Lync.msi is deployed to supported Windows clients.
The Microsoft Systems Management Server (SMS) 2003 or Microsoft System Center Configuration Manager (Configuration Manager) 2007 R2 automated deployments of the Lync.msi may not complete, or errors that are specific to the SMS environment or to the Configuration Manager environment may occur.
The Lync 2010 client must be installed by using the client executable file.
Note The initial installation of Lync 2010 on a supported Windows client creates the Lync.msi file in the following locations:
The Lync.msi file can be used to deploy the Lync 2010 client by using the local and automated deployment methods that are described in the "Symptoms" section.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
Use the Lync 2010 UseMSIForLyncInstallation Group Policy setting to enable or block MSI deployments for Lync.msi as follows:
Name: UseMSIForLyncInstallation Default: 0 Range: 1 or 0 Registry Location:
On the Edit menu, point to New, and then click DWORD Value.
Type UseMSIForLyncInstallation, and then press ENTER to name the registry entry.
Right-click UseMSIForLyncInstallation, and then click Modify.
In the Value data box, type 1 if that value is not already displayed, and then click OK.
Exit Registry Editor.
Restart the Windows client.
Note The Microsoft Windows Installer Tool (msiexec) should be used with at least the following parameters to ensure that the re-installation of Lync 2010 does not occur each time Lync 2010 is launched: