To create and edit a user account, use the Users section.
To change properties during user account creation and editing, use the General Properties tab on the Properties side panel:

User properties contain:
When roles of the information security administrator (ISA) and the application administrator (AA) are separated, the Member of Groups, Mandatory Access Control, Security Levels, Access Control tabs will be available only to the ISA.
When the information security administrator does not have permissions to update users, after changing the user group or the list of privilege holders the system displays a message that the changes will be applied only after the user is updated. To update users, contact the application administrator.
NOTE. Holders of the Applying User Permissions at DBMS Level privilege are determined during role separation.
If the ISA has the permission to update users, the user update is started.
See also:
Creating User Accounts and Working with Them | Editing Service User | Connecting Domain User