Microsoft 365 status updated
Exchange Online is having a minor outage
Some users' legitimate email messages may be marked as phishing and quarantined in Exchange Online
This chart shows the number of user-reported issues for Exchange Online service health over the past 24 hours, grouped into 20-minute intervals. It's normal to see occasional reports, which may be due to individual user issues rather than a broader problem.
See where users report Exchange Online is down. The map shows recent Exchange Online outages from around the world.
Exchange Online Outage MapSee what users report when Exchange Online is down and how Exchange Online outages affect them.
Virtoso - No inbound email. Messages deferred with 451 4.3.2 Temporary server error. Please try again later ATTR2 error.
Arayna - Not receiving emails, not sending emails, not receiving multi-factor authentications..
Nathan - Have not received new email in outlook for over 10 hours. When I access my email via Yahoo, there have been numerous emails sent to my inbox. Is the Exchange server for Outlook down?.
In the last 90 days, Microsoft 365 had 10 incidents with a median duration of 14 hours 43 minutes.
Incidents
Major Outages
Minor Incidents
Median Resolution
Check Exchange Online status history below. IsDown detects when Exchange Online is down, tracking both official outages and user-reported issues.
| Title | Started At | Duration |
|---|---|---|
|
Users routing their Exchange Online email through a third-party protection service may have send ...
Title: Users may experience delays when sending or receiving Exchange Online email messages
Use...
|
Jan 29, 2026 at 05:33 PM UTC
|
1 day |
|
Some users may be unable to send and receive emails in the Outlook desktop client or Outlook on t...
Title: Some users may be unable to send and receive emails in the Outlook desktop client or Outlo...
|
Jan 26, 2026 at 10:07 AM UTC
|
about 6 hours |
|
Some users may be intermittently unable to access the Exchange Online service through multiple co...
Title: Some users may be unable to access or load Outlook on the web
User impact: Users may be...
|
Jan 23, 2026 at 10:29 AM UTC
|
about 15 hours |
|
Title: Users' Outlook for iOS app version 5.2602.0 may crash or freeze on iPad devices
User impa...
|
Jan 21, 2026 at 05:49 PM UTC
|
2 days |
|
Some users may intermittently be unable to access their mailboxes using Internet Mailbox Access P...
Title: Some users may intermittently be unable to access their mailboxes using Internet Mailbox A...
|
Jan 08, 2026 at 04:35 AM UTC
|
about 8 hours |
|
Some users may be unable to open inbound Secure/Multipurpose Internet Mail Extensions (S/MIME) en...
Title: Some users may be unable to open inbound Secure/Multipurpose Internet Mail Extensions (S/M...
|
Nov 30, 2025 at 12:00 AM UTC
|
9 days |
|
Some users may be unable to search or see free/busy status of others in, or connect to classic Ou...
Title: Some users are unable to search in the Outlook Desktop client and Outlook on the Web
Use...
|
Nov 25, 2025 at 10:02 AM UTC
|
about 12 hours |
|
Some users may be intermittently unable to access their Exchange Online mailboxes using any conne...
Title: Some users may be intermittently unable to access their Exchange Online mailboxes using an...
|
Nov 20, 2025 at 01:25 PM UTC
|
4 days |
|
Title: Potential issues accessing mailboxes via one or more connection methods
User impact: User...
|
Nov 12, 2025 at 05:13 PM UTC
|
about 2 hours |
Exchange Online is down. You can check Exchange Online status and incident details on the top of the page. IsDown continuously monitors Exchange Online official status page every few minutes. In the last 24 hours, there were 0 outages reported.
Exchange Online seems to be having problems. You can check Exchange Online status and incident details on the top of the page. The status is updated in almost real-time, and you can see the latest outages and issues affecting customers.
Yes, there is an ongoing outage. You can check the details on the top of the page.
Yes, Exchange Online might be slow as there's an ongoing outage. You can check the details on the top of the page.
IsDown monitors the Exchange Online official status page every few minutes. We also get reports from users like you. If there are enough reports about an outage, we'll show it on the top of the page.
Exchange Online last outage was on February 05, 2026 with the title "Some users' legitimate email messages may be marked as phishing and quarantined in Exchange Online"
IsDown and DownDetector help users determine if Microsoft 365 is having problems. The big difference is that IsDown is a status page aggregator. IsDown monitors a service's official status page to give our customers a more reliable source of information instead of just relying on reports from users. The integration allows us to provide more details about Microsoft 365's Outages, like incident title, description, updates, and the parts of the affected service. Additionally, users can create internal status pages and set up notifications for all their third-party services.
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