Microsoft Planner - Remove email disclaimer

Hi Gerardo Moreno Diaz , jcgonzalezmartin , wgroves 

Very old thread, but when I had the same issue today it was the first that came up.

In our case the solution was to EXCLUDE emails from having the Disclaimer added to them in the system which your company uses to add the Disclaimer.

In our case we use Exchange Online > Mail flow > rules

In there we have a rule which adds the disclaimer to every email , except ones which match certain criteria.

The criteria to add which stops the disclaimer being added to Planner Plan Task comments is:

excluding mails that match
"Message headers"  that "match these text patterns"
"X-MS-TrafficTypeDiagnostic" - message header matches - "PlannerComment"

After implementing that and waiting 1min, the next Planner Task comment that got added in our M365 environment DID NOT have the disclaimer at the bottom of it.

I hope this helps other people who discover this problem as they move to Exchange Online.