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Exchange Online · Forced move · Announced February 5, 2026 · Sources checked Oct 13

Time to bail on Apps that use EWS with Exchange Online?

Time to Bail · Boarding pass

FromApps that use EWS with Exchange Online
ToYour pick

Act. You can stay.

EWS is blocked by default since October 1, 2026 and turned off for good on April 1, 2027. Move apps to Graph.[1]

Act means: change a setting or plan before the date. You can stay.

Gate closes
EWS turned off for good
Time left
167days
Status
Act

Exchange Online turns off EWS for good on April 1, 2027

Microsoft started blocking Exchange Web Services (EWS) in Exchange Online on October 1, 2026. On April 1, 2027 it is turned off for good. Apps must move to Microsoft Graph.

How it is winding down

  1. Feb 5, 2026Plan publishedDone
  2. Oct 1, 2026Blocked by default fromDone
  3. Apr 1EWS turned off for goodNext

What to do before April 1

Tick steps as you go. Your progress stays in this browser.

  1. Find what still uses EWS

    Open the EWS usage reports in the Microsoft 365 admin center. List each app and script.

  2. Ask each vendor for a Graph version

    Backup, CRM, room booking and mail tools may use EWS. Ask when they move to Microsoft Graph.

  3. Move your own scripts to Graph

    Rewrite in-house code to call Microsoft Graph. Finish before April 1, 2027.

Facts we checked

Facts and their sources
EWS turned off for goodApril 1, 2027[1]
Blocked by default fromOctober 1, 2026, for tenants that left the EWS setting empty[1]
Until then, admins canTurn EWS back on, with or without a list of allowed apps[1]
Turning it back onThere will be a service interruption[1]
After the final dateAdmins can no longer turn EWS on; no exceptions[1]
Exchange Server on your own serversNot affected[1]
Microsoft's replacementMicrosoft Graph[1]
How to see EWS useEWS usage reports in the Microsoft 365 admin center[1]
Plan publishedFebruary 5, 2026[1]
Apps and scripts that use EWSStop working with Exchange Online after April 1, 2027[1]

Sources

Check it yourself. Every fact above links here.

  1. Exchange Online EWS, your time is almost up Microsoft · primary · checked Oct 13
Read the published editorial report

What changed

Time to bail on Apps that use EWS with Exchange Online? Act. You can stay. EWS is blocked by default since October 1, 2026 and turned off for good on April 1, 2027. Move apps to Graph.

On our scale this is Act: change a setting or plan before the date. You can stay.

Microsoft started blocking Exchange Web Services (EWS) in Exchange Online on October 1, 2026. On April 1, 2027 it is turned off for good. Apps must move to Microsoft Graph.

Here are the facts we checked:

  • EWS turned off for good: April 1, 2027 (Microsoft)
  • Blocked by default from: October 1, 2026, for tenants that left the EWS setting empty (Microsoft)
  • Until then, admins can: Turn EWS back on, with or without a list of allowed apps (Microsoft)
  • Turning it back on: There will be a service interruption (Microsoft)
  • After the final date: Admins can no longer turn EWS on; no exceptions (Microsoft)
  • Exchange Server on your own servers: Not affected (Microsoft)
  • Microsoft's replacement: Microsoft Graph (Microsoft)
  • How to see EWS use: EWS usage reports in the Microsoft 365 admin center (Microsoft)
  • Plan published: February 5, 2026 (Microsoft)
  • Apps and scripts that use EWS: Stop working with Exchange Online after April 1, 2027 (Microsoft)

You can stay on Exchange Online. You have to change a setting or plan before the date.

Leaving is a choice here, not a must.

Microsoft is the main source for this page. Exchange Online has not said more than what is listed here. If a fact is not on this page, we do not know it yet.

Who is affected

Apps and scripts that use EWS: Stop working with Exchange Online after April 1, 2027.

The date to remember is April 1, 2027. Make the change before then.

What to do before April 1

  1. Find what still uses EWS. Open the EWS usage reports in the Microsoft 365 admin center. List each app and script.
  2. Ask each vendor for a Graph version. Backup, CRM, room booking and mail tools may use EWS. Ask when they move to Microsoft Graph.
  3. Move your own scripts to Graph. Rewrite in-house code to call Microsoft Graph. Finish before April 1, 2027.

A few tips:

  • Make the change yourself before the date. Do not wait for the last reminder email.
  • Write down your current plan or settings first, so you can compare after the change.
  • After the change, open your settings again and check that it worked.

How to tell your users

If the change affects your members or team, send one short email. Say what changes for them and when. Put the most important line first.

If there is a date, send a short reminder a few days before it. Keep a copy of the list you sent it to.

Options people mention

Listed for convenience. Not ranked. Not paid. These names come up in threads and reviews; that does not show where people moved.

Before you pay, check the price page of each tool yourself. Prices change, and we only list what our sources say.

Questions people ask

No questions collected yet.

Sources

Thanks.

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