MC1530957 - Microsoft Teams: Threads will become the default layout for new channels created with Microsoft Graph
Microsoft 365 Message Center announcement MC1530957.
MS Message Center's Summary
Microsoft is changing the default message layout for new Microsoft Teams channels created via Microsoft Graph without an explicit layout type, moving from posts to threads starting in late November 2026. Existing channels are unaffected. Administrators should review internal provisioning scripts and third party tools to ensure channel creation requests explicitly specify the required layout type before rollout occurs.
- Administrator impact
- Administrators must update custom scripts and automation tools that create Teams channels via Microsoft Graph if the posts layout is still required.
- End user impact
- End users will see the new threads layout by default in newly provisioned channels created through automated processes that omit layout settings.
- Importance
- 4/10: Automated channel creation processes may fail to produce the expected layout unless scripts are updated.
Microsoft Summary
Starting late November 2026, new Microsoft Teams channels created via Microsoft Graph without a specified layoutType will default to the Threads layout ("chat"). Existing channels remain unchanged. Organizations should update automation to specify "post" if Posts layout is required or test workflows for compatibility with Threads.
- Message Center ID
- MC1530957
- Category
- plan For Change
- Severity
- normal
- Services
- Microsoft Teams
- Tags
- User impact, Admin impact
- Published
- 2026-10-29
- Last updated
- 2026-10-29
- Expires
- 2026-12-30
[What and why] We're updating the default message layout for new Microsoft Teams channels created through the Microsoft Graph v1.0 Create channel API ( POST /v1.0/teams/{team-id}/channels ). When a channel creation request doesn't specify the layoutType property, the new channel will use the Threads layout instead of the Posts layout. This change applies only to newly created channels. Existing channels won't change. [Rollout schedule] General Availability (Worldwide, GCC, GCC High, DoD): Beginning in late November 2026 and expected to complete by late November 2026 [Impact on your organization] Who is affected Organizations with applications, scripts, or automated provisioning workflows that create Microsoft Teams channels through Microsoft Graph without specifying the layoutType property Platforms and services Microsoft Teams and Microsoft Graph v1.0 Create channel API What will happen If layoutType is omitted, new channels will use the Threads layout instead of the Posts layout. If "layoutType": "post" is specified, new channels will use the Posts layout. If "layoutType": "chat" is specified, new channels will use the Threads layout. The API value for the Threads layout is "chat" , not "threads" . Existing channels won't change. Channel creation requests that explicitly specify a supported layout aren't affected. [Action required and recommendations] Notify developers and owners of applications or automation that create Teams channels through Microsoft Graph. If your organization requires new channels to continue using the Posts layout, update channel creation requests to explicitly include "layoutType": "post" before rollout begins. For third-party solutions, contact the provider to confirm how the solution specifies the channel layout. If Threads is your desired layout, no request changes are required to adopt the new default. Review and test dependent workflows for compatibility with Threads. Learn more Create channel - Microsoft Graph v1.0 | Microsoft Learn [Compliance considerations] No compliance considerations identified. Review as appropriate for your organization.