> ## Documentation Index
> Fetch the complete documentation index at: https://devdocs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# VmUnassignmentStartedEventPayload

> VmUnassignmentStartedEventPayload data type.

## Properties

| Name                           | Type                                                                          | Description                                                |
| :----------------------------- | :---------------------------------------------------------------------------- | :--------------------------------------------------------- |
| AssignmentDurationMs           | double                                                                        | The duration (milliseconds) that the VM has been assigned. |
| BillingAssignmentCorrelationId | String                                                                        | The guid string ID of the billing assignment.              |
| BuildId                        | String                                                                        | The guid string ID of the build.                           |
| Region                         | [AzureRegion](/services/playfab/api-references/events/data-types/azureregion) | The build region.                                          |
| SessionId                      | String                                                                        | The guid string ID of the session.                         |
| UnassignmentEventTimestamp     | DateTime                                                                      | The time (UTC) the virtual machine unassignment started.   |
| VmId                           | String                                                                        | The virtual machine ID that is being unassigned.           |
| VmOs                           | String                                                                        | The virtual machine's operating system.                    |


## Related topics

- [vm_unassignment_started](/services/playfab/api-references/events/MultiplayerServers/vm-unassignment-started.md)
- [VmAssignedEventPayload](/services/playfab/api-references/events/data-types/vmassignedeventpayload.md)
- [VmUnhealthyEventPayload](/services/playfab/api-references/events/data-types/vmunhealthyeventpayload.md)
- [vm_assigned](/services/playfab/api-references/events/MultiplayerServers/vm-assigned.md)
- [vm_unhealthy](/services/playfab/api-references/events/MultiplayerServers/vm-unhealthy.md)