I worked at a company a couple years ago that was running on Active Directory, Outlook, and good old fashioned Windows and Microsoft Office licenses. They wanted to "modernize" and so I was to learn about Teams/M365/Azure/Entra/Copilot/etc, and report on some options for what licenses we could get and which products we could use. It was bananas how difficult it was for me to understand what their product offerings were, due to frequent name changes and multitude of overlapping products/licenses. It was my job to figure out what software we wanted to pay them for, and Microsoft made it as difficult as possible - what they actually wanted was for us to get on calls with their sales staff, so they could tell us what we should pay them for.