Create an acroynm index reference link
Corporations create acronyms ad nauseam. I've seen people create their own that only they can understand. Then they gain steam. Some companies are good enough to have a glossary on their confluence or other such intranet page, but let's be honest, they're rarely referenced.
As soon as Outlook sees a string of capital letters, e.g. AWOL, it should have a certain behavior that accesses commonly used acronyms by this email-writer and even allows them to create their own. I think of this similar to the corporate email list that people can access when they type in commonly used email names or can choose new ones. But w/ in-line writing like @ and # behavior, users can then hover over and see they are using the correct acronym. AWOL may mean "asbent w/out leave" or "a walk on limes".
I came here to add this exact feature request and it's great that someone else has also been thinking about it and already requested it... I would love to be able to right click or hover on an acronym and see the definition for it, much like how I can see synonyms for words.