| EX1550543 |
Users may be unable to connect to their mailboxes in Exchange Online through multiple connection methods
Exchange Onlineincident
|
Active |
12 Nov 2026 |
12 Nov 2026 |
| EX1542065 |
Some users may not see free/busy info shared between organizations using cross-tenant access policy in Exchange Online
Exchange Onlineadvisory
|
Active |
04 Nov 2026 |
12 Nov 2026 |
| EX1478331 |
Some users’ email messages may not be quarantined and fail to be stored in the quarantine folder
Exchange Onlineincident
|
Resolved |
23 Sep 2026 |
12 Nov 2026 |
| EX1490154 |
Users may receive duplicate email messages sent to mailboxes using Exchange Online SMTP forwarding
Exchange Onlineadvisory
|
Resolved |
30 Sep 2026 |
11 Nov 2026 |
| EX1545193 |
Some users may be intermittently unable to send email messages to Outlook.com, Hotmail.com, or Live.com email addresses
Exchange Onlineincident
|
Resolved |
06 Nov 2026 |
10 Nov 2026 |
| EX1545302 |
Some users may have experienced errors or failures when accessing their mailbox via Outlook on the web
Exchange Onlineincident
|
Resolved |
09 Nov 2026 |
09 Nov 2026 |
| EX1537187 |
On-premises users may see inconsistent results when viewing the hybrid free/busy information for Exchange Online users
Exchange Onlineadvisory
|
Resolved |
26 Oct 2026 |
04 Nov 2026 |
| EX1479349 |
Users may be unable to reply or reply-all to email messages sent to Microsoft 365 groups in Exchange Online
Exchange Onlineadvisory
|
Resolved |
08 Sep 2026 |
02 Nov 2026 |
| EX1531593 |
Users may be unable to access Notes in Outlook on the web
Exchange Onlineadvisory
|
Resolved |
30 Oct 2026 |
02 Nov 2026 |
| EX1532233 |
External users’ replies to encrypted email messages may not be delivered in Exchange Online
Exchange Onlineincident
|
Resolved |
29 Oct 2026 |
30 Oct 2026 |
| EX1528992 |
Users may not be able to open email file attachments or see the "Open" option in the new Outlook desktop app
Exchange Onlineadvisory
|
Resolved |
28 Oct 2026 |
29 Oct 2026 |
| EX1527500 |
Some users may see intermittent failures when accessing Exchange Online through Representational State Transfer (REST)
Exchange Onlineincident
|
Resolved |
27 Oct 2026 |
28 Oct 2026 |
| EX1477761 |
Admins experience intermittent failures adding, modifying or removing members from Exchange Online distribution groups
Exchange Onlineadvisory
|
Resolved |
09 Jun 2026 |
22 Oct 2026 |
| EX1500900 |
Admins are unable to access the Exchange admin center (EAC)
Exchange Onlineincident
|
Resolved |
12 Oct 2026 |
19 Oct 2026 |
| EX1483540 |
Users were intermittently unable to access their calendars in Outlook on the web and the new Outlook desktop client
Exchange Onlineadvisory
|
Resolved |
01 Jul 2026 |
19 Oct 2026 |
| EX1507783 |
Some users' mailbox syncs may fail with an error in Exchange Online
Exchange Onlineincident
|
Resolved |
29 Sep 2026 |
14 Oct 2026 |
| EX1491694 |
Some users' email messages from on-premises Exchange servers to Exchange Online may intermittently fail
Exchange Onlineincident
|
Resolved |
08 Oct 2026 |
08 Oct 2026 |
| EX1483619 |
Some users' email with DocuSign URLs may not be delivered and may be quarantined due to URL reputation
Exchange Onlineincident
|
Resolved |
28 Sep 2026 |
07 Oct 2026 |
| EX1478163 |
Users may be unable to update calendar delegates in the classic Outlook desktop client
Exchange Onlineadvisory
|
Resolved |
23 Sep 2026 |
05 Oct 2026 |
| EX1441488 |
Some users may see unwanted add-ins appearing automatically across all Outlook clients
Exchange Onlineadvisory
|
Resolved |
17 Jul 2026 |
05 Oct 2026 |
| EX1473834 |
Some users may be unable to search for email in Outlook desktop and Outlook on the web
Exchange Onlineincident
|
Resolved |
18 Sep 2026 |
02 Oct 2026 |
| EX1478033 |
Some users may be unable to search mailbox or Address Book content in Exchange Online across connection methods
Exchange Onlineincident
|
Resolved |
19 Sep 2026 |
01 Oct 2026 |
| EX1476802 |
Some users may be unable to open the account view in Outlook on the web
Exchange Onlineadvisory
|
Resolved |
22 Sep 2026 |
23 Sep 2026 |
| EX1477191 |
Potential issues accessing mailboxes via one or more connection methods
Exchange Onlineadvisory
|
Resolved |
22 Sep 2026 |
23 Sep 2026 |
| EX1477039 |
Users may experience errors or failures when accessing their mailbox from Exchange Online connection methods
Exchange Onlineincident
|
Active |
22 Sep 2026 |
22 Sep 2026 |
| EX1473059 |
Users may be unable to access Outlook on the web from a specific Outlook link
Exchange Onlineadvisory
|
Resolved |
15 Sep 2026 |
18 Sep 2026 |
| EX1473520 |
Users may have encountered issues with the auto compose feature in Outlook mobile app for iOS
Exchange Onlineadvisory
|
Resolved |
15 Sep 2026 |
18 Sep 2026 |
| EX1465910 |
Users may have been unable to load themes in Outlook on the web
Exchange Onlineadvisory
|
Resolved |
24 Jul 2026 |
16 Sep 2026 |
| EX1464935 |
Users may be unable to connect to, or experience degraded functionality with Exchange Online
Exchange Onlineincident
|
Resolved |
31 Aug 2026 |
11 Sep 2026 |
| EX1467029 |
Users may experience delays sending and receiving email messages from external domains in Exchange Online
Exchange Onlineincident
|
Resolved |
04 Sep 2026 |
10 Sep 2026 |
| EX1469261 |
Some users may be unable to search in Exchange Online
Exchange Onlineincident
|
Resolved |
08 Sep 2026 |
09 Sep 2026 |
| EX1458145 |
Users may be unable to complete mailbox offboarding because the migration task is blocked and can’t finish
Exchange Onlineadvisory
|
Resolved |
11 Aug 2026 |
27 Aug 2026 |
| EX1435168 |
Some users may be unable to view location and subject details for other users' Exchange Online calendar items
Exchange Onlineadvisory
|
Resolved |
14 Jul 2026 |
26 Aug 2026 |
| EX1442215 |
Admins are unable to complete some cross-tenant mailbox migrations in Exchange Online
Exchange Onlineadvisory
|
Resolved |
14 Feb 2026 |
24 Aug 2026 |
| EX1456866 |
Some users may be unable to send or receive new Exchange Online email through the native iOS mail app
Exchange Onlineincident
|
Resolved |
17 Aug 2026 |
18 Aug 2026 |
| EX1454755 |
Users may be unable to send email externally and may receive DNS-related errors.
Exchange Onlineincident
|
Resolved |
14 Aug 2026 |
14 Aug 2026 |
| EX1442253 |
Users may be unable to add their personal Google or Gmail calendars in Outlook on the web
Exchange Onlineadvisory
|
Resolved |
24 Feb 2026 |
13 Aug 2026 |
| EX1452407 |
Users may be unable to access their mailbox with any Exchange Online connection methods
Exchange Onlineincident
|
Resolved |
11 Aug 2026 |
11 Aug 2026 |
| EX1438592 |
Users in the United Kingdom may experience errors or failures when accessing their mailboxes in Exchange Online.
Exchange Onlineincident
|
Resolved |
24 Jul 2026 |
25 Jul 2026 |
| EX1428537 |
Some users may be unable to view mailbox storage data in Outlook and Outlook on the web
Exchange Onlineadvisory
|
Resolved |
12 Jul 2026 |
22 Jul 2026 |
| EX1426934 |
Some admins may be unable to make changes to distribution lists in Exchange Online and receive an error
Exchange Onlineadvisory
|
Resolved |
12 Jul 2026 |
15 Jul 2026 |
| EX1426511 |
Users may be unable to drag and drop email messages between folders in new Outlook and Outlook on the web
Exchange Onlineadvisory
|
Resolved |
10 Feb 2026 |
14 Jul 2026 |
| EX1427120 |
Some users were unable to see conference room availability for Exchange Online through a room-booking application
Exchange Onlineadvisory
|
Resolved |
13 Jul 2026 |
14 Jul 2026 |
| EX1233142 |
Some users may see that when selecting a meeting room when scheduling meetings, it changes from available to unavailable
Exchange Onlineadvisory
|
Resolved |
08 Dec 2025 |
06 Jul 2026 |
| EX1409958 |
Some users may encounter crashes in the classic Outlook desktop app when right clicking in an email message
Exchange Onlineadvisory
|
Resolved |
29 Jun 2026 |
01 Jul 2026 |
| EX1394927 |
Admins may be unable to perform actions involving Domain Name System (DNS) records within the Exchange admin center
Exchange Onlineadvisory
|
Resolved |
17 Jun 2026 |
20 Jun 2026 |
| EX1396891 |
Admins may be unable to provision some users’ Exchange Online mailboxes
Exchange Onlineadvisory
|
Resolved |
18 Jun 2026 |
19 Jun 2026 |
| EX1392948 |
Users' Input Method Editor (IME) for Japanese/Korean input may be disabled and may switch to English in Exchange Online
Exchange Onlineadvisory
|
Resolved |
16 Jun 2026 |
18 Jun 2026 |
| EX1386636 |
Users may be unable to see the free/busy status of multiple cross-tenant mailboxes in Exchange Online
Exchange Onlineadvisory
|
Resolved |
14 May 2026 |
17 Jun 2026 |
| EX1310533 |
Users may be unable to view free/busy status for Gmail users within the Exchange Online calendar
Exchange Onlineadvisory
|
Resolved |
11 May 2026 |
15 Jun 2026 |
