Past Incidents

Microsoft have confirmed that the settings change deployment has finished. Affected users will need to refresh their Outlook on the web browser page to enable these settings, which will cause the client to automatically reconnect to the server at five-minute intervals. Once this initial refresh is performed, users having this problem will see new email notifications within a maximum of five minutes after the message arrival. We're additionally working to enable enhanced telemetry logging within the service to gather information on the root cause. We expect this process to be completed within a few days

Microsoft has identified the root cause and hopes to have rolled out a fix by Tuesday 11th February 2020.

"We've completed testing a solution to mitigate impact for affected users. Once implemented, this fix should allow users to receive new mail notifications without performing a page refresh. Furthermore, we’re working to enable expanded logging in a portion of the affected environment to provide additional data on the root of the problem. We’ve initiated deployment of this change throughout the affected environment, which we anticipate will complete by Tuesday, February 11, 2020."

Microsoft have resolved the issue.