[sfifs]

I actually have tried and unfortunately nothing beats Excel - PowerPoint. OneDrive added a killer feature a few years ago in auto Documents and Desktop backup which makes transitioning computers or using temp laptops painless - no more "re-imaging" and massive workload reduction for Tech suppprt. I assume you could now do this in DropBox as well but it wasn't so before OneDrive made this the default. Outlook client is also the only polished desktop mail client (ie. some mail is actally stored offline on laptop and you can pull up old emails on a flight or when you have poor connectivity) and I understand the server makes compliance easier.

Enterprises don't go Microsoft Suite because they are primarily good enough. In some categories, there is virtually no competiton and in others, the good enough is tolerable.