Microsoft ships something into Microsoft 365 most weeks. Almost none of it needs your attention.
A handful of changes do, because they alter what you are licensed for, what your staff see when they open an app, or where your files actually live. Those are the ones below, with the dates attached, because a feature announcement without a date is not much use when you are planning a year.
Copilot now has three levels, and only one of them sees your data
This is the change that costs people money, because the word “Copilot” now covers three different things.
Microsoft sets out three licence levels. Copilot Chat is the baseline included with eligible Microsoft 365 licences. It answers from public web data, and if you want it to use your own content you have to paste it in, upload a file, or work with a document already open in Teams or Outlook.
Microsoft 365 Copilot without the add-on gives you Copilot inside Word, Excel, PowerPoint and OneNote, but Microsoft describes that access as “standard”, “subject to service capacity”, and says it “might vary throughout the day”.
The paid add-on is the one that reads your organisation’s own material: emails, files, meetings, calendars and who works with whom, through Microsoft Graph and Work IQ. It also brings priority access, so it does not slow down when everyone else is using it.
That distinction is the entire purchase decision. If the value you want is “summarise this document I am looking at”, you may already have enough. If the value you want is “what did we agree with that supplier in March”, you need the add-on and there is no way around it.
Worth a reality check. Across the businesses we support, Copilot came up in six jobs in the year to 18 August 2026, all from one business. Email came up in 317, across 88 businesses. Whatever the roadmap says, the day to day is still mailboxes.
Loop components are files, and that has consequences
Loop components are the live blocks you can drop into a Teams chat or an Outlook email: a task list, a table, a set of notes that everyone edits in place rather than mailing versions around.
They are genuinely useful for the thing they are good at, which is a small shared list that would otherwise become eleven replies.
The part nobody mentions is where they live. Microsoft is clear that Loop components created in Teams and Outlook are .loop files stored in the creator’s OneDrive. Three consequences follow.
If the person who made it leaves, OneDrive retention policies apply to that file the same as any other content they created. If someone tidies up by moving the file from OneDrive to a SharePoint site, Microsoft states the component then fails to load in the chat or email it was shared into. And if a staff member has no OneDrive, they cannot create components at all, though they can still edit someone else’s.
So Loop is fine for working notes. It is not where a decision record belongs.
The new Outlook is coming, and there is a date for planning
Microsoft has published the three stages for moving Windows users to the new Outlook.
Right now it is opt-in. Users see a “Try the new Outlook” toggle, it is off by default, and both versions can run side by side.
Then comes opt-out, where the new Outlook is on by default and users can still switch back. Then cutover, where they cannot. Microsoft commits to at least 12 months notice before each of those stages lands in managed enterprise plans and production rings.
The line worth writing in your plan: existing installations of classic Outlook, through both perpetual and subscription licensing, “will continue to be supported until at least 2029”.
That is enough runway to be calm about it. It is not enough to ignore it, particularly if you have an add in, a practice management integration or a shared mailbox workflow that only exists in classic Outlook. Test those now, while you can still switch back with a toggle.
Teams Premium changed what is in the box
Teams Premium is a separate add-on licence. Users need both a Teams licence and a Teams Premium licence for its features to work.
What it includes moved. As of 1 April 2026, Microsoft says some features that previously required Teams Premium are now included with Teams Enterprise. Teams Premium continues to carry advanced meeting protection, advanced communication such as the Queues app, branding and personalisation, and the intelligence features including intelligent meeting recap and live translated captions.
Customers who bought Teams Premium before 1 April 2026 keep access to everything that was included, until those licences expire.
If someone quoted you Teams Premium last year for a feature you have not yet turned on, get the quote re-checked. You may already have it.
Live events are gone, and video moved house
Two structural changes that catch people out.
Teams live events retired on 30 June 2026. Events scheduled before that date are supported through to 28 February 2027, and Microsoft points organisations at town halls and the unified events experience instead. If you run an all hands or a quarterly briefing that someone set up years ago, check which one it actually is.
Separately, Stream (Classic) is deprecated and enterprise video now runs through Clipchamp, with the files stored in OneDrive and SharePoint like any other document. Microsoft’s own framing is that there is no longer a separate video portal you must use.
For an administrator this is mostly good news, because it means retention, legal hold, eDiscovery, audit logs and permissions apply to a training video exactly as they do to a spreadsheet. It also means video counts against the same storage, and a few years of meeting recordings add up faster than anyone expects.
The limits, so you can stop guessing
While we are here, the meeting numbers people ask us for most. On Business Basic, Business Standard, Business Premium, Teams Essentials and A1 plans you can host up to 300 people. The enterprise plans go to 1,000. Meetings and events cut off at 30 hours.
What to actually do about any of this
Pick the two that touch your business and ignore the rest. For most small businesses that is the Copilot licence question and the Outlook timeline.
One step for today: open your Microsoft 365 admin page and look at what Copilot licences you are paying for, if any. If you are paying for the add-on and nobody is using answers grounded in your own data, you are paying for the expensive version of something you already had.
If you would like a second opinion on what you are licensed for, get in touch.