Topic Last Modified: 2013-02-11

After you install a Client Access server that is running the Microsoft Exchange Unified Messaging Call Router service, you can configure several options, including the number of concurrent calls, the TCP and Transport Layer Security (TLS) listening ports, the status, and the startup mode.

It’s not required that Client Access servers be added to a UM dial plan before it can process calls for Unified Messaging (UM), except when you’re integrating UM and Microsoft Office Communications Server 2007 R2 or Microsoft Lync Server. By default, all Client Access servers in an organization are available to answer incoming calls.

For additional tasks related to Unified Messaging and Client Access servers, see UM Services Procedures.

What do you need to know before you begin?

  • Estimated time to complete: 5 minutes.

  • You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "Client Access server (UM call router service) " entry in the Unified Messaging Permissions topic.

  • Verify that the Client Access server is installed, either on the same computer as the Mailbox server or on a separate computer.

  • For information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard Shortcuts in the Exchange Admin Center.

Having problems? Ask for help in the Exchange forums. Visit the forums at: Exchange Server, Exchange Online, or Exchange Online Protection.

What do you want to do?

Use the Shell to configure Unified Messaging properties on a Client Access server

This example removes a Client Access server named MyClientAccessServer from all Session Initiation Protocol (SIP) dial plans.

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Set-UMCallRouterSettings -DialPlans $null - Server MyClientAccessServer

This example adds a Client Access server named MyClientAccessServer to a SIP dial plan named MySIPDialPlan and also sets the maximum number of incoming voice calls.

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Set-UMCallRouterSettings -DialPlans MySIPDialPlan -MaxCalls 150 -Server MyClientAccessServer

This example sets the SIP TCP listening port to 5077 and the startup mode to Dual mode on a Client Access server named MyClientAccessServer.

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Set-UMCallRouterSettings  -Server MyClientAccessServer-SipTCPListeningPort 5077 -UMStartUpMode -Dual 

Use the Shell to view Client Access server properties

This example displays a list of all the Client Access servers.

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This example displays a formatted list of properties for the Client Access server.

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Get-UMCallRouterSettings | Format-List