Reminder: End of Support for Semi-Annual Enterprise Channel Preview on September 9, 2025

The Semi-Annual Enterprise Channel Preview for Microsoft 365 Apps ends support on September 9, 2025, with the August 2025 update as the last. Admins must transition devices to Monthly Enterprise or Current Channel, as updates will cease and no automatic changes will occur. As previously announced in MC1087098 (June 2025), Microsoft is retiring the Semi-Annual Enterprise Channel Preview for Microsoft 365 Apps. This change supports our ongoing efforts to simplify update management and ensure customers benefit from the latest features and security improvements more quickly. When this will happen: The Semi-Annual Enterprise Channel Preview reached end of service on September 9, 2025. The August 2025 security update is the final update available for this channel. How this affects your organization: Who is affected: Admins managing Windows desktop apps that with devices currently configured to use the Semi-Annual Enterprise Channel Preview. What will happen: Devices using this update channel will no longer receive updates for Microsoft 365 Apps after September 9, 2025. Microsoft recommends transitioning interactive devices to Monthly Enterprise Channel or Current Channel. Non-interactive devices can use Monthly Enterprise Channel as a release candidate to preview changes coming to Semi-Annual Enterprise Channel. No changes will be made automatically; admin action is required to move devices to a supported updated channel. What you can do to prepare: Review your update channel configurations and transition devices to a supported channel. Change update channel to prepare devices for Copilot For non-interactive devices that require Semi-Annual Enterprise Channel, consider using Monthly Enterprise Channel as a release candidate. Using Monthly Enterprise Channel as the release candidate Communicate this change to your helpdesk and update internal documentation as needed. Ensure all devices are updated to the latest version of Microsoft 365 Apps. Overview of update channels for Microsoft 365 Apps Update history for Microsoft 365 Apps (listed by date) Compliance considerations: No compliance considerations identified, review as appropriate for your organization. Message ID: MC1150680

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