The e-mail address you use to login is your account within ABOSS. It is not possible to change it directly.
If you want to work from a different e-mail address, you need to create a new account. The following steps will guide you through it.
For Agency users
Add the new user with it's e-mail address to your account and give it the right permissions. This article will explain how.
If you want, you can delete your old account. This will not effect the data within your environment. This article will tell you how to delete a user.
For Artist PRO users
Add the new user with it's e-mail address to your account.
If the new user already uses ABOSS with this e-mail address, check out this article.
If the new user doesn't use ABOSS yet with this e-mail address, check out this article.
Set the permissions for the new user. This article will explain how.
If you want, you can delete your old account. This will not effect the data within your environment. This article will tell you how to delete a user.