Welcome back Prachi, • Both will need to be on the same version of AC so
either she upgrades or you install the previous version (which should
not be a problem). • You don't need a dedicated server for TW though it
helps but if you are working remote...
This is a weird situation and depends on who is sending information to
whom. If AC 22 is going to do MEP then you can work in 22 without MEP
and he can add the info and you will be able to open it in 22 though not
edit it. You can also work in 25/24 ...