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Sample name: PublishAlwaysOnline
Sample location: %ProgramFiles%\Microsoft Office Communications Server 2007 R2\UCMA SDK 2.0\UCMACore\Sample Applications\Collaboration\QuickStarts\ PublishAlwaysOnline
Replace the credentials in the variables at the beginning of the code sample with the credentials and server of the users from your Office Communications Server topology.
Substitute the address of the called user in the code snippet with the address of a valid, currently signed-in user capable of receiving audio calls.
Open the project in Microsoft Visual Studio, and then press F5.