Microsoft 365 Message Center MC1388721: 30-Day Reminder: Final deployment phase for Kerberos RC4 hardening begins with the July 2026 Windows security update 🚨Major Update: This post contains a significant change that may impact your
Microsoft 365 Message Center MC1388720: Windows Office Hours: June 18, 2026 If you are an IT admin with questions about managing and updating
Microsoft 365 Message Center MC1388719: Microsoft Teams: Granular channel notification settings Microsoft Teams will introduce granular channel notification presets—All new messages, Mentions and replies, and Mute—with further customization for mentions and threads. This rollout begins late July 2026 worldwide, is enabled by default, requires no admin changes, and aims to improve notificati...
Microsoft 365 Message Center MC1388718: Microsoft Defender for Endpoint: Update to Linux connectivity requirements with new service URLs to allowlist Microsoft Defender for Endpoint on Linux now requires allowlisting new service URLs specific to tenant types for delivering internal configuration updates, feature rollouts, and critical issue mitigations. This update is available worldwide, with no change to user experience, and ensures devices ...
Microsoft 365 Message Center MC1388706: Microsoft 365 Copilot: Legal agent available in Frontier worldwide Microsoft is expanding the Legal agent in Microsoft 365 Copilot for Word to Frontier users worldwide in Public Preview starting mid-June 2026, with general availability in early July 2026. This AI-powered tool helps legal professionals review contracts, identify risks, and generate edits using Wo...
Microsoft 365 Message Center MC1388467: Microsoft Dataverse – Service Update 9.2.26062.00000 for GBR We have a minor service update planned for your Microsoft Dataverse environment
Microsoft 365 Message Center MC1388147: Power Platform admin center - Environment Group Rules Gallery We are announcing the Environment Group Rules Gallery in Power Platform admin
Microsoft 365 Message Center MC1387846: Dynamics 365 Customer Service - Enforce governance policy We are announcing the ability to enforce governance policy in Dynamics 365
Microsoft 365 Message Center MC1387814: Microsoft Teams: RTMP-In port and domain changes required Microsoft Teams will update RTMP-In port and domain requirements by mid-July 2026 to improve streaming reliability. Admins must allow outbound access to ports 50118, 50119, and domain *.rtmpingest.mcr.teams.cloud.microsoft. Existing RTMP-In events work until end of 2026; new events need updated n...
Microsoft 365 Message Center MC1387810: Microsoft Planner: Planner Agent chat coming to Frontier Microsoft Planner is integrating the existing Planner Agent chat from Microsoft 365 Copilot directly into Planner’s interface for basic plans, enabling users to manage tasks and gain insights without leaving Planner. This feature, enabled by default for eligible Frontier users, rolls out mid-June...
Microsoft 365 Message Center MC1387809: Microsoft 365 Archive: File-level archiving will be enabled by default for existing customers File-level archiving in Microsoft 365 Archive will be enabled by default for existing customers starting July 6, 2026. It allows archiving individual SharePoint files to cold storage with compliance maintained. Admins can disable or limit this feature via PowerShell. Users with edit permissions c...
Microsoft 365 Message Center MC1387806: Anthropic Claude Fable 5 available in Copilot Cowork (Frontier) Anthropic Claude Fable 5 (preview) is now available as an opt-in, admin-controlled model in Microsoft 365 Copilot Cowork (Frontier) for complex tasks. It requires data retention by Anthropic under separate terms. Admins must enable and manage access, ensuring compliance with data retention and pr...