This article describes how you can add a new Category which can then be used in Mailissa Team
For the Team module of Mailissa you can assign categories to mails. On this page you can edit those categories, translate them or assign different colors to them.
To access the administrational part of the Mailissa Portal you need your M365 credentials. Open a browser and navigate to https://portal.mailissa.com.
Login using your M365 username and password. The first user account that logs in will be the tenant admin for Mailissa.
After that navigate to "Categories" and add a new category by using the "New Category" button.
Fill in the needed information. After that the new Category will appear in Mailissa Team.