Ended
Windows 10, Exchange 2016 and 2019 reached end of support
No more free security updates. Commercial Windows 10 devices can buy Extended Security Updates for up to three years.
394 days ago
News and deadlines
Migration news and deadlines
End-of-support dates, service retirements and rule changes that force a migration, each linked to the official announcement.
Deadline tracker
Dates that force a migration
Countdowns update every day. Each card links to the official source.
Ended
Exchange Online blocks EWS by default
Apps that still use Exchange Web Services stop working unless an admin has allowed them by app ID.
42 days ago
Ended
Last Exchange 2016 and 2019 security updates
The extended security update programme ended with the October 2026 release. Microsoft says there will be no further extension.
12 days ago
Coming up
Privacy policies must describe automated decisions
Organisations covered by the Privacy Act must explain in their privacy policy when computer programs make or help make significant decisions about people.
In 28 days
Coming up
Windows Server 2016 reaches end of support
Plan upgrades or moves to Azure for any server still on 2016, including file servers and domain controllers.
In 61 days
Later
EWS removed from Exchange Online
Exchange Web Services is switched off for all tenants with no exceptions. Apps must use Microsoft Graph.
In 140 days
Latest news
What changed and what it means for your migration
Exchange
Exchange 2016 and 2019 updates have stopped. Here is what to do now
The October 2026 security update was the last one under the extended programme. Our new hub walks through the three realistic options and the supported way to remove the last Exchange server.
Official sources, checked 4 Nov 2026Microsoft Tech Community: October 2026 Exchange Server security updatesMicrosoft Learn: Remove the last Exchange server in a hybrid deployment
Exchange Online
Microsoft confirms the EWS timeline
EWS is disabled by default from 1 October 2026 and removed for everyone on 1 April 2027. Admins can allow named apps until then, but the allow list does not extend past the shutdown.
Official source, checked 4 Nov 2026Microsoft Tech Community: Exchange Online EWS, your time is almost up
Exchange hybrid
A supported way to remove the last Exchange server
Microsoft now documents moving Exchange attribute management to the cloud (IsExchangeCloudManaged), so hybrid tenants no longer need an Exchange server just to manage recipients.
Official source, checked 4 Nov 2026Microsoft Learn: Remove the last Exchange server in a hybrid deployment
Privacy
Automated decision-making rules start on 10 December 2026
The OAIC has consulted on guidance for the new privacy policy transparency rules. Check whether any system you migrate makes or supports significant decisions about people.
Official source, checked 4 Nov 2026OAIC: Guidance on transparency in automated decision-making
Microsoft Teams
Cross-tenant Teams chat migration enters public preview
Microsoft announced migration of 1:1 and group chats and meetings between tenants. Channel conversations still need a third-party tool.
Official source, checked 4 Nov 2026Microsoft 365 Message Center MC1198079
Windows Server
Windows Server 2016 support ends 12 January 2027
Microsoft says Extended Security Updates will be available as a temporary bridge, not a long-term plan.
Official source, checked 4 Nov 2026Microsoft Windows Server blog: Planning ahead for Windows Server 2016 end of support