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Applies to: Exchange Server 2013, Exchange Server 2016
You can specify the maximum number of minutes that an incoming call can be connected to the system without being transferred to a valid extension number before the call is ended. For most organizations, this value should be set to the default: 30 minutes. This setting applies to all calls, including incoming Outlook Voice Access calls, voice calls internal to your organization, voice calls into Unified Messaging (UM) auto attendants, and fax calls placed from outside your organization.
This value can be set to a number from 10 through 120. Setting this value too low can cause incoming calls to be disconnected before they're completed. For example, if your organization receives many large fax messages, you may want to consider increasing this value from the default so that all the pages of fax messages are received.
For additional tasks related to UM dial plans, see UM dial plan procedures in Exchange Server.
What do you need to know before you begin?
Estimated time to complete: Less than 1 minute.
You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "UM dial plans" entry in the Unified Messaging permissions topic.
Before you perform these procedures, confirm that a UM dial plan has been created. For detailed steps, see Create a UM dial plan.
For information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard shortcuts for the Exchange admin center in Exchange 2013.
Tip
Having problems? Ask for help in the Exchange forums. Visit the forums at Exchange Server.
Use the EAC to configure the maximum call duration
In the EAC, navigate to Unified Messaging > UM dial plans.
In the list view, select the UM dial plan you want to modify, and then click Edit
.On the UM dial plan page, click Configure.
In Settings, under Maximum call duration (minutes), enter the number in minutes.
Click Save.
Use the Shell to configure the maximum call duration
This example sets the maximum call duration to 10 minutes on a UM dial plan named MyUMDialPlan.
Set-UMDialPlan -identity MyUMDialPlan -MaxCallDuration 10