There might be times when you need to start a virtual server that is not currently running. For example, when you change the connectivity settings for a virtual server, The Communicator Web Access snap-in automatically stops that server. You must start that server before users can access the site. You can use the snap-in to start a virtual server.
To start a virtual server
Log on to the computer that is running the Communicator Web Access snap-in. To start a virtual server, you must log on as a member of the local Administrators group and the RTCUniversalServerAdmins group.
Click Start, point to Administrative Tools, and then click Microsoft Office Communications Server 2007 R2, Communicator Web Access.
In the console tree, expand the name of the computer that hosts the virtual server that you want to start, right-click the name of the virtual server, and then click Start.