as reuqired by BE Admin manual, we should intall Exchange Managment Tools on the Backup Exec server if you want to backup exchange 2007/2010
but, in my enviroment, I have not install EMS on the Backup exec server, and I can backup my exchange 2010 and restore mails for the users. why?
I beleive you need to have the management tools installed when you want to have GRT backup . I guess backup exec needs it when wrting catalog information to tape where in it needs to expand to individaul mailboxes and may for generating the restore selection list for GRT backup set which is stored on disk.