We just updated our internal use server from 7242 to 7348 yesterday. This server has less than 100 users and only 10 users on MAPI today. Previously the server would run at 15% memory usage, today it is running at 50%. Most of it is an IIS worker process, I am assuming this is MAPI through IIS. 

Considering how many hundreds of EAS users we have on production servers (some well over 1000), with the addition of MAPI, we are going to need 5X the amount of RAM to run this. It's not a big deal as long as its not a memory leak or continue to work well with lots of RAM. 

Also, this morning the POP server crashed.