>>On May 15th I noticed unwanted advertising in Outlook (M365 subscription) - see attached image.
>>I suspect it's from Microsoft (it was for Teams). That "notification" bar had an "X" at the right side to close it, which I did - and it hasn't come back since.
>>
>>I couldn't find anything on the web about this. I started a support incident with M365 but they're playing dumb.
>>
>>I suspect MS floated it as a trial balloon to see if users would tolerate advertising in Office apps. Or maybe there's a lower-cost version which is supported by ads and they "inadvertently" turned on the ads for premium plans.
>>
>>Has anyone else seen anything similar?
>
>I subscribe to Family M365 but I don't see it. Actually I wish I could use MS Team with my M365 Family.
>I would cancel my subscription with GoToMeeting.

Your wish was granted yesterday: https://www.theverge.com/2021/5/17/22439924/microsoft-teams-personal-version-launch-available-download