Office 365 AND Dynamics (CRM, Finance, ERP etc.)
The one thing Microsoft really needs still is in house, industry specific layers to drop on top of dynamics, such as https://www.mtwocloud.com/ instead of depending on these third parties. Microsofts own sales teams don't know these products exist, and they have poor visibility. Enough companies won't even touch Dynamics, preferring something more industry specific.
Look at all the other things they cover in the SalesForce, Adobe, Oracle realm that automatically integrate right into the Power Platform.
https://dynamics.microsoft.com/en-us/