Resolved: Opening or downloading attachments may not work in Outlook on the Web. Access to Exchange Online mailboxes may also be intermittent.

The issue with attachments in Outlook on the Web and connectivity to Microsoft Exchange Online has been resolved. Service has been restored.

Opening or downloading attachments may not work in Outlook on the Web. Access to Exchange Online mailboxes may also be intermittent.

Here is the latest update from Microsoft:

"We're continuing to monitor our fix deployment as it saturates throughout the remaining 10 percent of the affected environment. Many previously impacted users will begin to experience significant impact relief as this saturation finalizes. In tandem, we're implementing a program to identify and restart the Notification service as persistent errors are identified.

 Next Update By:  Friday, April 17, 2026 at 4:00 PM EDT"

Opening or downloading attachments may not work in Outlook on the Web. Access to Exchange Online mailboxes may also be intermittent.

CIT has reported the issue and is working with Microsoft to resolve it.