@Aliysa_Enhance I think i missed that feature or didn't understand it, Let me explain it with a example:
I want to give users for example 10 GB Email in total, and they can create a unlimited amount of email addresses if they want, but some users use more then 50GB or even 100GB email so even with dynamic mailboxes i have to create a new package like a XL mail pack or so. It would be more convenient that i coult extent de mailbox size per account or per user, as this is also not Common.
Another example,
User has 10 GB in use and we need to enlarge the email diskspace, it would be convenient to do on a per user/account level then switching him to another package....