We can launch office communicator from Run window using the command communicator. However this command does not work from command line as the install path of office communicator is not found in the standard path pointed by PATH environment variable. The default installation path for communicator is [systemdrive]:\Program Files\Microsoft Office Communicator. If OS is installed is on C: drive then the installation path is C:\Program Files\Microsoft Office Communicator.
So to launch communicator from windows command line we need to use start command which automatically finds the path of communicator and launches it.
Alternatively we can launch communicator by specifying the complete path of communicator.exe
c:\>"C:\Program Files\Microsoft Office Communicator\communicator.exe"
Below listed are few tips on how to change communicator settings from command prompt.
If you do not want communicator to auto start immediately after you login to the system, you can disable this from command line using the below command.
Reg add HKEY_CURRENT_USER\Software\Microsoft\Communicator /v AutoRunWhenLogonToWindows /t REG_DWORD /d 0 /f
Or if you want communicator to start but not to display the main window immediately after login you can do it by executing the below given registry change command.
Reg add HKEY_CURRENT_USER\Software\Microsoft\Communicator /v AutoOpenMainWindowWhenStartup /t REG_DWORD /d 0 /f