The RBAC Application Impersonation role in Exchange Online is retiring, with the process starting in September 2024 and completion in February 2025. Applications must be updated to avoid disruption, using App Registration and Application permissions. For guidance, visit the provided links.

Microsoft is changing how to enable or disable the new Outlook for Windows and Outlook for the web. The rollout will start in late April 2025 and finish by mid-May 2025. The CASMailbox-`OWAEnabled` parameter will only block Outlook for the web, while the CASMailbox-`OneWinNativeOutlookEnabled` policy will manage the new Outlook for Windows. No admin action is required before the rollout.

Starting April 15, 2025, Exchange Online will reject emails with multiple From addresses without a Sender header to comply with RFC 5322. Tenants sending high volumes of such emails are opted out temporarily. Rollout for GCC High and DOD starts July 1, 2025. Ensure emails have a single Sender address if multiple From addresses are used.

Microsoft Exchange Online will enforce a new limit of 3,000 dynamic distribution groups (DDGs) per organization starting in early April 2025. Admins will need to remove existing DDGs before creating new ones once this limit is reached. This change is automatic and cannot be turned off.

New Exchange Online Tenant Outbound Email Limits (TERRL) will be introduced to reduce misuse and ensure service availability. TERRL restricts the number of external recipients a tenant can email daily, based on purchased email licenses. Enforcement starts in stages from April 3, 2025. Check the EAC report to monitor usage.

The behavior of the EWSEnabled switch in Exchange Online is changing. Starting April 1, 2025, EWS will only be allowed if both the organization-level and user-level EWSEnabled flags are true. This change aims to improve policy enforcement consistency. Check the blog for more details: [The way to control EWS usage in Exchange Online is changing](https://aka.ms/EWSEnabledChange).

The cmdlets `Search-MailboxAuditLog` and `New-MailboxAuditLogSearch` in Microsoft Exchange Online will retire in March 2025. Admins can access and modify records until late June 2025, after which they become static. Users should be notified, documentation updated, and auditing enabled to use `Search-UnifiedAuditLog`.

The RBAC Application Impersonation role in Exchange Online is retiring, with the process starting in September 2024 and completion in February 2025. Applications must be updated to avoid disruption, using App Registration and Application permissions. For guidance, visit the provided links.

The 'Monitor' action in Microsoft Exchange Online Protection's Safe attachments policy will be retired between February and May 2025. Organizations with policies set to 'Monitor' will be automatically switched to 'Block'. Users should review and adjust their Safe attachments policies accordingly.

Exchange Online will retire Basic Auth for SMTP AUTH in September 2025. Users must switch to OAuth or other alternatives. The SMTP AUTH Clients Submission Report in the Exchange admin center will indicate the authentication method used. This change aims to enhance security against vulnerabilities associated with Basic Auth.

Microsoft is rolling back the feature to review and update work hours and location in the My Day pane in Outlook until further notice. Users can still update this information in Outlook Settings. The rollout will happen automatically, and users should be informed about this change.

Microsoft Outlook for iOS and Android is enhancing the External Recipients MailTips feature for better offline accuracy and performance. The rollout, starting mid-February 2025 and completing by late April 2025, requires no admin action but users should be notified. More details will be updated on Microsoft Learn.

Microsoft is expanding the AI Administrator role in Microsoft Viva to manage Microsoft Copilot Dashboard settings without requiring Global admin privileges. This enhances security and aligns with least-privilege practices. The rollout will start mid-April 2025 and complete by late April 2025. No admin action is required before the rollout.

Microsoft Outlook for iOS and Android will soon support font selection while composing and reading emails. The rollout will start in mid-November 2024 and complete by late April 2025. Organizations should notify users and update training materials accordingly.

Notifications in Microsoft Outlook for Windows and Outlook for the web will be batched in the Notifications pane. The rollout starts in December 2024 for Targeted Release and February 2025 for General Availability. Users can access batched notifications via the bell icon. No admin action is required.

Microsoft Teams and Outlook will soon feature name pronunciation on profile cards, promoting inclusivity. Rollout starts mid-November 2024 for targeted release and late March 2025 for general availability. Users can record and listen to name pronunciations. Admins can enable this feature via Microsoft Graph.

Delegates in the new Microsoft Outlook for Windows and web can create and apply categories for the account owner's Calendar. Rollout starts mid-January 2025 for Targeted Release and mid-February 2025 for General Availability, completing by mid-April 2025. No admin action is required.

New Microsoft Outlook for web and Windows will import folder order from classic Outlook. Rollout begins late November 2024 for Targeted Release, January 2025 for General Availability, and early February 2025 for GCC. Users can customize folder order via the new Outlook ribbon. No admin action required.

Microsoft Outlook will soon have a feature to quickly see who is in the office based on work hours and location settings. The rollout for targeted release starts in mid-August 2024, with general availability from early October 2024 to early April 2025. No admin action is required.

Microsoft Outlook for iOS/Android will introduce large audience warnings starting mid-April 2025. Users with MailTips support can opt in to receive warnings when emailing over 25 recipients. Admins can customize this threshold. The rollout is automatic, with no required admin action. Notify users and update documentation as needed.

New Exchange Web Services (EWS) usage report will be available in the Microsoft 365 admin center by early April 2025. It provides insights into third-party applications using EWS, detailing specific actions and call volumes. No admin action is required before the rollout. See Roadmap ID 469510 for more details.

The installed name for new Microsoft Outlook on Windows will change from "Outlook (new)" to "Outlook" starting late March 2025, completing by early April 2025. This change is automatic and requires no admin action, but users should be informed and documentation updated.

New Outlook for Windows and Outlook on the web will move hover actions to the Sender/From column to save space and reduce mouse travel. This change will roll out in April 2025, with a one-time shortcut to set hover actions. No admin action is required.

New Outlook for Windows desktop and Outlook for the web will support a two-click view for encrypted emails starting April 2025. Admins can enable this feature, which requires user confirmation before accessing encrypted emails, to reduce accidental exposure. The setting is disabled by default.

The folder order in Microsoft Outlook mobile will sync with Outlook web, Mac, and Windows platforms. Rollout starts mid-April 2025 and completes by mid-May 2025. Users must reorder folders on non-mobile platforms. No admin action is required, but user notification and documentation updates are recommended.

Users will soon be able to move emails between accounts in the new Outlook for Windows and Outlook for the web. This feature is controlled by the Set-OWAMailboxPolicy policy. Rollout starts in February 2025 for Targeted Release, April 2025 for General Availability, and May 2025 for GCC. GCC High and DoD are excluded.

The Agent UX for Microsoft 365 Copilot, previously on desktop and web, is now available on mobile. Users can discover, add, and chat with agents in Teams, Outlook, and the Copilot app. Rollout starts mid-May 2025 and completes by late May 2025. No admin action required.

Administrators using third-party report message solutions in Outlook can now configure Defender for Office 365 to send these messages to Microsoft for analysis. The rollout starts in late March 2025 and ends early April 2025. Configuration involves setting the destination to "Microsoft and my reporting mailbox."

In the new Outlook for Windows and web, single-clicking on an empty calendar slot will enable inline appointment creation instead of a quick compose pop-up. Rollout starts early April 2025 for Targeted Release and early May 2025 for General Availability. No admin action is required; notify users and update documentation.

Microsoft Outlook for iOS will introduce an "Open the Email Above" setting in mid-February 2025, completing by mid-March 2025. This will replace the "Move to the Next Email" setting. No admin action is required, but user notification and documentation updates are recommended. More details can be found in the Microsoft 365 Roadmap ID 477362.

Disable add-in user reporting buttons in Microsoft Outlook as the built-in Report button is now generally available across all platforms. The Report Message and Report Phishing add-ins are in maintenance mode and will not receive improvements. Review your configuration and notify users of this change.

Users will soon be able to bulk import .eml files in the new Microsoft Outlook for Windows, starting mid-March 2025. This feature will be enabled by default and simplifies the process of importing multiple email files. No admin action is required before the rollout.

The enforcement of RFC compliance changes for Microsoft Teams voicemail messages has been postponed to May 2025. The "From" field will be updated to meet RFC 6854 standards, changing to noreply@skype.voicemail.microsoft.com. Organizations should allowlist this email by May 2025. Early adoption is available upon request.

Enhanced compliance and security for voicemail messages in Microsoft Exchange will be rolled out from May to mid-June 2025. Changes include updating the "From:" field to comply with RFC 6854 and adding "Unverified" and "External" tags to increase trust and security. No admin action is required.

Microsoft Outlook for iOS and Android will allow users to request message recalls within their organization starting in March 2025. This feature provides control to retract sent emails. No admin action is required, but users should be informed and documentation updated. More details are available in the Microsoft 365 Roadmap ID 471444.

The updated rollout timeline for the new Microsoft Outlook for Windows People Hub is now mid-April to mid-June 2025. The People Hub will feature a modern contact management experience with enriched profiles and auto-hidden duplicates. No admin action is required, but user notification and documentation updates are recommended.

The user privacy setting for optional connected experiences will be available in Microsoft Outlook on the web starting March 2025. Users can configure this setting via Settings > General > Privacy and data > Privacy settings. Admins should review current configurations and notify users. No admin action is required before the rollout.

Starting in March 2025, Outlook will introduce a setting to hide Copilot entry points, configurable per account and syncing across all Outlook applications. This applies to both organizational and personal accounts. Classic Outlook for Windows will not have this setting, but changes will sync with it. Admins should inform users.

New Outlook for Windows and web will allow users to pin the Favorites section at the top of the folder list for easier access. The rollout will occur from mid-November 2024 to early March 2025, depending on the release group. Users can pin/unpin via the folder list or Outlook ribbon. No admin action is required.

Microsoft Outlook for iOS/Android will soon allow users to request delivery and read receipts while composing emails and set preferences for future read receipts. The rollout will begin mid-March 2025 and complete by mid-April 2025. No admin action is required, but notifying users is recommended.

Administrators should review and update management policies for the new Microsoft Outlook for Windows. Key policies include configuring accounts based on Active Directory, controlling personal mailbox connections, and managing domain-specific mailbox connections. Detailed guidance and policy mapping from classic Outlook are available in the provided links.

Newsletters in Outlook for Windows and Web will allow users to create, distribute, and track internal email newsletters. The rollout begins in mid-February 2025 for Public Preview and August 2025 for General Availability. Access is controlled by OwaMailboxPolicy and requires configuration. Additional details and updates are provided.

Microsoft 365 (Office) app is now the Microsoft 365 Copilot app. Changes in the Microsoft Outlook apps for iOS and Android will occur in March 2025, including a new icon for Microsoft accounts. No admin action is required, but users should be notified. Learn more [here](https://support.microsoft.com/office/the-microsoft-365-app-transition-to-the-microsoft-365-copilot-app-22eac811-08d6-4df3-92dd-77f193e354a5).

Outlook users will soon have the option to include a comma in a recipient's contact name, useful for "Last name, First name" formats. This setting will be user-adjustable in Outlook's "Compose and reply" settings. Rollout begins mid-March 2025 for Targeted Release and mid-April 2025 for General Availability. No admin action is required for the rollout. Microsoft 365 Roadmap ID 470020.

New Outlook for Windows will soon allow users to set custom descriptions for their accounts, aiding in easier identification. This feature, part of Microsoft 365 Roadmap ID 470602, will roll out from late February to April 2025, with no admin action required for the update.

Microsoft Outlook for Windows will soon allow users to share local Word, Excel, and PowerPoint files via email. The rollout starts in October 2024 and finishes by August 2025. This feature is enabled by default, requiring no admin action prior to rollout. Users can share files directly from File Explorer.

Microsoft Outlook is updating to allow users to add shared folders to Favorites, starting early February 2025 for Targeted Release and March for General Availability. The update applies to Outlook for Windows and web, not Mac or mobile. No admin action is required for the rollout.

The new Microsoft Outlook for Windows update, rolling out from early March to late April 2025, will allow users to receive, snooze, and dismiss reminders while offline. Users must enable Reminders in Settings to use this feature, which is on by default for all new users.

The Tips pane in Microsoft Outlook will be relocated to the Help tab on the ribbon, affecting new Outlook for Windows and the web. This update, part of Roadmap ID 470022, will roll out from mid-January to mid-March 2025 and requires no admin action.

Exchange Online's introduction of an External Recipient Rate Limit (ERRL) will be enforced in phases starting January 2025, with a limit of 2000 external recipients in 24 hours. The rollout for existing tenants is delayed until October 2025, with full enforcement by April 2026. DoD, GCC, and GCC High organizations are currently exempt.

The message details the unification of contact lists across Outlook and Teams, allowing visibility and edits to be shared between both platforms. An initial migration has occurred, and a full transition to a unified contact experience is expected by April 2025. Organizations are advised to update documentation and encourage contact backups in Outlook.

Microsoft Outlook is updating features related to working hours and location, with rollout timelines specified for various user groups. The updates include a revised daily location menu and integration of work location with Out of Office time. No admin action is required for the rollout.