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Admin deadlines

What Microsoft and Apple are retiring, changing or enforcing, and when

One list for endpoint and identity admins: Intune, Entra ID, Exchange Online, Windows, PowerShell and Apple device management. Each entry says who is affected and what to do, and quotes the vendor line that gives the date.

Next 90 days
0
Upcoming in total
2
Passed in the last 6 months
2

Each date is quoted from the vendor’s own page. Dates move; check the source before you act. Where a vendor gives only a month or a rough period, we show that, not a made-up day. Checked 9 Nov 2026.

Clear

Upcoming (filtered)

April 2027

In 143 daysMicrosoftRetirement

Exchange Web Services (EWS) fully disabled in Exchange Online

Exchange OnlineMicrosoft 365

Who is affected
Every remaining EWS client of Exchange Online. On-premises Exchange is not part of this retirement.
What to do
  1. Confirm the EWS usage report shows no remaining production callers.
  2. Check the parity-gap roadmap on the EWS deprecation page for features your apps still need.
Source
“Phased disablement begins October 1, 2026, with permanent retirement on April 1, 2027.”
Exchange Online service description (Microsoft Learn)
EWS deprecation timeline“April 2027: EWS is fully disabled.”
Deprecation of Exchange Web Services in Exchange Online (Microsoft Learn)

Checked 9 Nov 2026 Link to this deadline

September 2027

Put these dates in your calendar

The calendar feed uses the filter you have selected and refreshes daily in Outlook, Apple Calendar and Google Calendar. Each event carries the actions and the source link.

Download .ics JSON

webcal://www.kbytechnologies.com/deadlines/calendar.ics?products=exchange-online,microsoft-365

Embed the next deadlines on your intranet

Paste this into a SharePoint embed web part or any page that allows iframes. Add &limit=10 to the URL for more rows.

<iframe src="https://www.kbytechnologies.com/deadlines/embed?products=exchange-online,microsoft-365" title="Upcoming Microsoft and Apple admin deadlines" width="400" height="460" loading="lazy" style="width:100%;max-width:480px;border:1px solid #e2e8f0;border-radius:12px"></iframe>

Recently passed

Dates from the last 6 months. If one of these still applies to you, you are already past the vendor’s date.

27 days agoMicrosoftEnd of support

Office 2021 and Office LTSC 2021 reach end of support

OfficeMicrosoft 365

Who is affected
Devices running perpetual Office 2021 or Office LTSC 2021 apps (Word, Excel, Outlook, PowerPoint, Access, Project, Visio and related products).
What to do
  1. Inventory Office 2021 and LTSC 2021 installs with Intune or Configuration Manager app inventory.
  2. Move users to Microsoft 365 Apps or a supported Office LTSC release.
Source
Product Retirements“Office 2021 | October 13, 2026”
Ending Support in 2026 (Microsoft Lifecycle)
Products reaching End of Support“Office LTSC 2021 | October 13, 2026”
Ending Support in 2026 (Microsoft Lifecycle)

Checked 9 Nov 2026 Link to this deadline

39 days agoMicrosoftRetirement

Exchange Web Services (EWS) phased disablement begins in Exchange Online

Exchange OnlineMicrosoft 365

Who is affected
Any application, script, add-in or device that reads or writes Exchange Online mailboxes through EWS, including third-party backup, archiving, CRM and room-booking tools.
What to do
  1. Run the EWS usage reports in the Microsoft 365 admin center to find apps still calling EWS.
  2. Ask each vendor for its Microsoft Graph release and date; migrate in-house code to Graph.
  3. Record apps with no Graph path yet and plan an alternative before April 2027.
Source
“Phased disablement begins October 1, 2026, with permanent retirement on April 1, 2027.”
Exchange Online service description (Microsoft Learn)
EWS deprecation timeline“October 2026: EWS starts to be disabled globally for all organizations.”
Deprecation of Exchange Web Services in Exchange Online (Microsoft Learn)

Checked 9 Nov 2026 Link to this deadline

How this list is made

  • Only dates stated on Microsoft Learn, Microsoft Lifecycle, Windows release health, Apple Developer or Apple’s published device management schema are included.
  • The quoted line is copied from that page. Where the date is only in a table, the row is quoted with cells separated by “|”.
  • Items without a vendor-stated date are left out, even when they are widely reported.
  • Days remaining are counted in UK time. A month or quarter counts as due for the whole period.