Email accounts management

Hello everyone! I'm new to Cpanel and need your help in order to control properly of my client's Cpanel. I'm helping a nonprofit to get things sorted and I discovered weird things in the Cpanel email accounts department. Basically, there is a ton of different email accounts set up and even more forwarders but in reality, we currently only need a few of them. So here are some of my main questions : - After an employee leaves the company, when do you delete this person's email account? - What happens to that account once it's deleted? Can we still have access to archived emails? - I currently set up forwarders so I can manage the emails coming from many of those account in one inbox, but now I realize that the emails are still coming in the inboxes of said accounts... So all the time I'm taking to delete and sort needs to be done in 2 accounts... What to do here!?! Thank you so much in advance for your help! Julie