M365 Message Center

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11.08.2026

Services

Microsoft Teams

Updated August 11, 2026: We are updating this post as a clarification. The change below was for WW customers only. This change does not apply to Sovereign Cloud environments. Customers in GCC, GCC High, and DoD must continue to configure a custom domain to use custom HTML editing and email template customization for Teams Events emails. We apologize for any confusion.We're clarifying our guidance around custom domain configuration for Teams event emails, based on customer feedback and recent questions.In a previous Message Center post (MC1234575 and MC1176301), we communicated that configuring a custom domain was required to use custom HTML editing for event emails. Based on customer feedback, this is no longer mandatory effecting immediately.[When this will happen:]Effective immediately[How this affects your organization:]Premium feature of custom HTML editing for Teams Events (Webinar

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06.08.2026

Services

Microsoft Teams · Microsoft 365 for the web

Updated August 6, 2026: We have updated the timeline. Thank you for your patience. [Introduction] As part of our ongoing mission to deliver a modern, secure, and scalable one-stop management portal for admins, we are transitioning Teams Android device management from the Teams admin center (TAC) to the Teams Rooms Pro Management portal (PMP). This move consolidates management of all Teams devices, including Teams Rooms on Windows, Teams Rooms on Android, Teams phones, and Teams panels, into a single unified portal, providing IT admins a consistent and seamless experience for managing devices at scale.This message is associated with Roadmap ID 555235. [When this will happen:]General Availability (Worldwide): Effective July 2, 2026, the rollout is 100% complete across all regions in the Public cloud.General Availability (GCC High and DoD): We expect to start the rollout by mid-August 2026

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04.08.2026

Services

Microsoft Copilot (Microsoft 365) · Microsoft 365 Copilot Chat

Updated August 4, 2026: We have updated the timeline. Thank you for your patience. [Introduction]We’re updating how entities inserted from Add Work Content under the + menu behave in Microsoft 365 Copilot and Copilot Chat. With this change, entity names (such as document titles, people names, or other referenced objects) will no longer be inserted as text within the input box, making it easier for users to craft clean prompts without needing to manually delete entity labels. This feature is available to both users with a Microsoft 365 Copilot license (Microsoft 365 Copilot users) and users without a Microsoft 365 Copilot license (Copilot Chat users), but the experience varies.This message is associated with Microsoft 365 Roadmap ID 552592.[When this will happen]General Availability (Worldwide): Rollout begins in mid-August 2026 (previously late May) and completes by late August 2026 (pre

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04.08.2026

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Exchange Online

Updated August 4, 2026: We have updated the timeline. Thank you for your patience. [Introduction] We’re improving the RSVP experience in Outlook Mobile by visually highlighting the response a user has selected (Yes, Maybe, or No). This makes it easier for users to quickly see how they’ve responded to a meeting invitation.[When this will happen:] General Availability (Worldwide, GCC, GCC High): Rollout begins mid-September 2026 (previously August) and is expected to complete by mid-October 2026 (previously end of August).[How this affects your organization:]Who is affected: All users who access Outlook Mobile on iOS or Android Applies to Worldwide, GCC, and GCC High tenants What will happen: The selected RSVP option (Yes, Maybe, or No) will be visually highlighted Users can quickly confirm how they responded to a meeting invitation and edit as needed The feature is enabled by default No c

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03.08.2026

Services

Microsoft Teams

Updated August 3, 2026: This feature was temporarily rolled back, and we have updated the timeline. Thank you for your patience. [Introduction]Microsoft Teams is introducing two new system chat sections called Muted chats and Meeting chats. These sections allow users to organize their chat and channels list by grouping muted conversations and meeting chats into dedicated sections that users can turn on or off. The new Meeting chats section will replace the Meeting chats filter, that was previously available at the top of the chat and channel list. This message is associated with Microsoft 365 Roadmap ID 559605.[When this will happen]General Availability (Worldwide, GCC, GCC High, DoD): Rollout begins in early September 2026 (previously mid-August) and is expected to complete by end of October 2026 (previously end of September).[How this affects your organization]Who is affectedAll Micros

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03.08.2026

Services

Microsoft Defender XDR

Updated August 3, 2026: We have updated the timeline. Thank you for your patience. [Introduction]We are enhancing how Microsoft Defender for Office 365 identifies and manages promotional email. Promotional messages will be tagged as “promotions” (previously “Bulk” in preview) and can be moved automatically to a new Promotions folder. The system learns from user actions, such as moving messages into or out of the Promotions folder and applies those preferences to future messages. These improvements reduce inbox clutter and help users stay focused while still receiving promotional content they want.[When this will happen]Public Preview (Limited): We will begin rolling out in mid-April 2026 and expect to complete by mid-May 2026 (previously end of April). To be included in the public preview program, send an email to BulkMailPreviews@microsoft.com indicating: Organization name, Tenant ID an