Handle queue overflow

When a new work item arrives, unified routing in Dynamics 365 Customer Service directs it to the agent who's best suited to work on it. But what happens if all the agents who could work on it are already at maximum capacity? And how do you handle work items that arrive when your call center is closed? Overflow handling in Customer Service helps you manage both surge conditions and after-hours calls.

You can handle multiple overflow scenarios for a queue before the work item is queued:

• An incoming call or conversation exceeds the number of work items defined for the queue.
• A work item comes in outside of business hours.

If you don't set up overflow handling, then by default, the work item is added to the queue and the customer waits to be connected to an agent. You can send notifications to the customer, for example, about their place in the queue or when their query will be resolved.

Prerequisites

• Unified routing is configured and you've set up queues and added agents to them.
• If you plan to transfer calls to an external number, external phone numbers with outbound calling are available.
• You've configured route-to-queue rules in the workstream.

Handle overflow before work item is queued

Unified routing checks for overflow conditions after evaluating the route-to-queue rules and before directing a work item to a queue. If an overflow action transfers the work item to another queue, or a supervisor assigns the work item to an agent or transfers it to a different agent, the work item is assigned to the agent or the queue without any further overflow checks.

The system considers the following factors when it checks for overflow conditions before a work item is queued:

• If multiple queues match the route-to-queue rules, the system routes the work item to the first queue that's not overflowing.

• If all matched queues are overflowing, then:

  • If a queue is operational, the system routes the work item to it and triggers the overflow action.
  • If none of the queues are operational, the system routes the work item to the queue that will be operational earliest and triggers the overflow action.

• If percentage-based routing is configured, the overflow conditions are evaluated after percentage-based routing matches a queue.

• If the matched queue is overflowing due to multiple conditions, the system triggers the action that's defined for the operating hours condition first, followed by the other conditions in the order they're defined.

• If a work item is routed to a fallback queue because of errors or no route-to-queue rule matches the requirement, the system ignores the overflow settings for the fallback queue and assigns the work item to it.

• If a bot is configured for the workstream, the system checks for overflow conditions only after the bot escalates the conversation to a human agent. If multiple escalations happen, the system checks for overflow conditions and triggers an action after the first one.

When you add an operating hour record to a queue, the system assigns a default overflow condition Out of operation hours with the action Assign to queue anyway. You can't edit the condition, but you can set a different action for it.

The channel-specific operating hour setting that's configured in the workstream doesn't affect the overflow settings.

The following table lists the conditions and actions that are available for each channel type.

Channel	Condition	Action
Voice	Out of operating hours Work item limit exceeds Average wait time	Assign to queue anyway Direct callback End call Transfer to a different queue Transfer to an external number Voicemail
Live chat and other messaging channels	Out of operating hours Work item limit exceeds	End conversation Transfer to a different queue Assign to queue anyway
Record	Out of operating hours	Assign to queue anyway Transfer to a different queue

Configure overflow conditions for before a work item is queued

1. In the Customer Service admin center site map, select Customer support > Queues.

2. Select Advanced queues, and then select the queue you want to manage overflow for.

3. In the Overflow handling page, to the right of Before work items are queued, select Add condition-action pair.

4. In the Condition dropdown list, select the condition that you want to set for the queue. The available conditions depend on the channel type.

5. In the Action dropdown list, select the action that you want to trigger when the condition is met.

6. Enter as many condition-action pairs as you need for the queue, and then select Save and close.

   

• For the record, messaging, and voice queues, you can select the Out of operation hours condition and one of the following actions:

  • Assign to queue anyway: The work item is directed to the queue even though it's overflowing.
  • Transfer to a different queue: The work item is transferred to the queue that you select in the dropdown list.

• For the messaging and voice queues, you can also select the following actions for the Out of operation hours condition:

  • End call: For voice queues only. An automated voice message plays and the call ends.
  • End conversation: For messaging queues only. The conversation is routed to the queue and ended.
  • Transfer to an external number: For voice queues only. The work item is transferred to the phone number that you enter.
  • Voicemail: For voice queues only. The customer can choose to leave a voicemail.

• For the messaging and voice queues, you can also select the following conditions and actions:

  • Work item limit exceeds: Enter a number between 1 and 100 to indicate how many open work items can be in the queue before it overflows. For example, if you enter 2, then if the queue contains two open work items, the arrival of a third item triggers one of the following actions:

    • Direct callback: For voice queues only. The customer can choose to have the agent call them back. The work item stays open and is routed to the next available agent for callback.
    • End call
    • End conversation
    • Transfer to a different queue
    • Transfer to an external number
    • Voicemail

  • Average wait time: For voice queues only. Enter a number and select a unit of time between 30 seconds and 60 minutes to indicate how long the predicted wait time can be before the queue overflows. For example, if you enter 10 Minutes, then if a customer calls and the predicted wait time is 15 minutes, the system triggers one of the following actions:

    • Direct callback
    • End call
    • Transfer to a different queue
    • Transfer to an external number
    • Voicemail

    The average wait time for a queue is calculated by taking the average wait time of at least 50 conversations in the queue during the previous 48 hours. If the number of conversations in the previous 48 hours is less than 50, the Average wait time overflow condition isn't evaluated.

Configure rule-specific overflow conditions for before a work item is queued

Sometimes you might not want an overflow action to run for specific types of work items or for priority customers. Let's say that a priority customer calls, the queue to which they're routed is overflowing, and the queue is set to end the call or keep the customer waiting. Either action might violate the service-level agreement that you have with your customer. In this scenario, you might want to configure rule-specific overflow conditions for the queue in the route-to-queue rules of the workstream.

1. In the Customer Service admin center, go to the workstream and select the route-to-queue rule in which the queue is configured.

2. Select the workstream, and then select the route-to-queue rule in which the queue is configured.

3. Under Route to queues, select the queue in the dropdown list, and then select More commands (⋮) > Handle rule-specific overflows.

   

4. Select overflow condition-action pairs.

View diagnostics for overflow handling

When a work item is handled by an overflow action instead of being assigned to an agent, you can view its status in Routing diagnostics > Route to queue.

Edit automated messages for overflow actions

If you set End call or End conversation as an overflow action, you can edit the automated message that informs the customer that no agents are available.

1. In the Customer Service admin center site map, select Customer support > Customer settings.

2. Select Automated messages.

3. Find the automated message for the channel where the message trigger is End conversation due to overflow.

4. Edit the value of the Localized text column as needed.

Learn more about customizing automated messages.

See also

Configure voicemail
Configure direct callback
Create and manage queues
Configure percentage-based routing
Overview of voice channel
Overview of unified routing
Configure routing for the voice channel