In a rapid change of Office 365, Microsoft sends to Tenant Admin’s the news about what is changing and what is coming in Office 365.


This is the 235th email that Microsoft has sent to Tenant Admin’s Newsletter with Office 365 changes.


This Weekly digest is intended to reach the Administrators of Microsoft Office 365 within the latest changes that are happening to Office 365.


Below is an example that can be applied to your tenant, because these emails are based on the services that you have in your Tenant and subscription.



Message center announcements,
September 13-19, 2021


Major updates


Anti-malware policy : Common attachment filter : Additional file types block by default


MC285906 | September 18 – The ‘Common attachment filter’ option in the ‘Anti-malware’ policy helps the Administrator configure the file types (based on file extension) which need to be blocked in the emails. This block action is applied anytime the file type of any attachment in the email matches this configurated file type list. The current pre-configured list has 96 file types. Of these 96 file types, 10 files types are selected by default in the block list. When a new policy is created, these 10 file types are…


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Join meetings anonymously from your Teams desktop app (across clouds)


MC285905 | September 18 – Today, if you want to join a meeting hosted in a different cloud to one of your tenant, you are directed to use the Teams web experience. We are improving the experience to allow users to join meetings across clouds from their desktop app anonymously.


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Additional updates


Microsoft 365 compliance center: New and updated sensitive information types (SITs) for compliance solutions


MC285913 | September 18 – In our continued efforts to improve the coverage and accuracy of out-of-the-box sensitive information types (SITs), we are adding 5 new SITs and updating the definition of some existing SITs. These new and updated SITs can be used in compliance solutions within the Microsoft 365 compliance center.


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Reply to specific chat message in Teams Desktop


MC285886 | September 18 – With this update, Microsoft Teams Desktop users will receive the long awaited ability to reply to specific messages in chat from the message actions menu. This will help bring more context into conversations. This feature has already been available on the iOS and Android apps. This message is associated with Microsoft 365 Roadmap ID 81113.


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Records Management: General Availability of Multi-stage disposition review


MC285604 | September 17 – Multi-stage disposition review in the Microsoft 365 Records Management solution enables you to create a tiered content disposition experience with up to five stages of review. Multiple reviewers can be added per stage, and reviewers will only see items assigned to them along with contextual information about the file.Note: This feature will be Generally Available to all E5 commercial customers. E3 can upgrade to E5 to benefit from this feature. This message is associated with Microsoft 365…


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OneDrive: New Command Bar


MC285602 | September 17 – With this update users will be able to easily identify the right file and access primary commands. The new simplified view will permit users to focus on the content while at the same time being visually pleasing.This message is associated with Microsoft 365 Roadmap ID 85602.


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New SharePoint hub to hub associations


MC285601 | September 17 – This release will add the ability to associate a SharePoint hub site to another hub site to expand search results across multiple hubs in your organization. This will enable users to discover relevant content when searching on any sites related to the associated hubs. This message is associated with Microsoft 365 Roadmap ID: 85613


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(Updated) Breakout rooms: Pre-meeting room creation and participant assignment


MC278891 | September 16 – Updated September 16, 2021: We have updated the rollout timeline below. Thank you for your patience. We are adding the ability for meeting organizers to pre-create rooms ahead of a meeting start and perform participant assignment tasks (both auto and manual) in advance.This is rolling out on desktop only.This message is associated with Microsoft 365 Roadmap ID 81390.


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Breakout Rooms Presenter support


MC278893 | September 16 – Updated September 16, 2021: We have updated the rollout timeline below. Thank you for your patience. We are adding the ability for organizer to extend the management of Breakout Rooms to specific presenters. This feature will enable meeting organizers to add and remove presenters as Breakout Room managers.By taking control from Breakout rooms management panel, appointed presenters will be allowed to perform Breakout room operations as manager or meeting organizer, as well as joining Rooms as…


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Updates available for Microsoft 365 Apps for all channels


MC285145 | September 15 – We’ve released updates to the following update channels for Microsoft 365 Apps: Current Channel Monthly Enterprise Channel Semi-Annual Enterprise Channel (Preview) Semi-Annual Enterprise Channel


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Co-authoring on Microsoft Information Protection encrypted documents in Office Desktop is Generally Available


MC285023 | September 14 – Co-authoring on Word, Excel, and PowerPoint documents encrypted with Microsoft Information Protection sensitivity labels on Windows and Mac is now generally available. This feature is already available on Office on the web This message is associated with Microsoft 365 Roadmap ID 82112.


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SharePoint Navigation Switcher


MC285021 | September 14 – This feature update will bring users a new navigation option feature for SharePoint team sites. Team site owners will be able to switch the team site navigation orientation from vertical to horizontal. Additionally, site navigation visibility can be turned off completely. This new navigation option allows site owners to customize their team site by changing navigation’s orientation and visibility to achieve a different look and feel, layouts, and alignment styles. This message is associated…


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(Updated) New people-centric search features coming to Microsoft Search


MC275345 | September 14 – Updated September 14, 2021: We have updated the rollout timeline below. Thank you for your patience. This new feature, People-centric search is rolling out to Microsoft Search. This update will allow people in your organization to find content through people, and understand people through their content.This message is associated with Microsoft 365 Roadmap ID 68783.


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(Updated) Real-time messaging protocol (RTMP) Streaming Support to Custom Endpoints


MC268726 | September 14 – Updated September 14, 2021: We have updated the rollout timeline below. Thank you for your patience. Microsoft Teams will support the ability for your users to stream their Teams meetings and webinars to large audiences through real-time messaging protocol (RTMP) including endpoints outside your organization.This feature will rollout on desktop and Mac. This message is associated with Microsoft 365 Roadmap ID 83562.


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Microsoft 365 Records Management–Announcing public preview of adaptive policy scopes for retention and label policies


MC280914 | September 14 – Updated September 14, 2021: We have updated the rollout timeline below. Thank you for your patience.This new feature (preview), Adaptive policy scopes, will allow data administrators to scope retention policies and retention label policies to a dynamic set of users, SharePoint sites, or Microsoft 365 Groups. This is enabled by using the properties or attributes associated with these locations. Adaptive policy scopes work with all locations, including Exchange mailboxes, Microsoft 365 Groups,…


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To view all announcements, sign in to Microsoft 365 admin center



Note: My Tenant is based in Europe with Target Release Enabled. You can view more messages on your portal, just go to the Message center.


Quickly access relevant information and functionality from the new home page—The home page has been redesigned with you and your most common tasks in mind—such as adding a user or resetting a password. The new admin center makes these items accessible directly from the home page. The home page also proactively surfaces information important to you, such as notifications from the Message Center.



More news and more information here –


If you what to know more about Office 365 here is my book – Office 365 Essentials –

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