Exclamation [Q] Backup Help

I have my company's email configure on my phone, basically its gmail account. So I have google device policy app also installed.

I keep on flashing new roms, everytime I flash new rom, I have to ask my company's it administrator to reactivate my email.

I tried using titanium backup pro to backup and restore, its works. Can someone tell me exactly which app and data needs to be backup, so I don't have to backup all the app and data