Using classic Outlook for Windows in business environments
Look forward to any updates and certainly feel free to ask any questions
As for Win 10 - Win 11, there's no rush, Win10 will be around for quite a while yet. As far as W11 goes, just a matter of getting used to a new way of doing things but the first thing you need to make sure of is whether or not Win11 is supported on your computer. Since it's still running WIn7, it's probably likely that you will need new computer if you want to go to Win11.
If you don't want to buy a new machine (if necessary), would definitely recommend upgrading the machine to WIn10