Microsoft stops 'FCM Messages' notifications on Microsoft Teams

People received random test notifications on Microsoft Teams yesterday.

What you need to know

• A strange notification reading "FCM Messages Test Notification!!!!" was sent out to people through Microsoft Teams.
• Many people received the message several times within a short timespan.
• Microsoft has since mitigated the issue.

Microsoft Teams users received an unwelcome series of notifications yesterday. The mysterious notifications read "FCM Messages Test Notifications!!!!" Some people received the message several times, with one person on Twitter stating they received 14 notifications within a couple of hours. Microsoft investigated the issue and has since applied a mitigation.

The Microsoft 365 Status Twitter account states that the issue only affected Android devices. Thursday afternoon, the account shared that Microsoft had "isolated the source of the issue and applied a mitigation."

Twitter user Paul Tuck shared a screenshot of the odd notifications.

Sure here's a screenshot I took of, complete with too many exclamation marks and too many S of both Notifications and Messages pic.twitter.com/6DZJcuoCh4

— Paul Tuck (@Hobbes330) August 27, 2020

The notifications didn't seem specific to any timezone, so some people received the notifications in the middle of the night.

While notifications like this shouldn't be sent out, you can make sure that you don't receive any notifications in the middle of the night by changing your status on Microsoft Teams.