There are several ways to log into your mailbox using WebMail:
Automatic authorization in WebMail will not be available if the user who has access to the mailbox is alone changed password From him. The possibility of automatic authorization will resume only after changing the password in mailbox settings... You can prevent users from changing their password by setting WebMail design for the required domain.
If in the section "Mailboxes"The login button opposite the desired mailbox is called"to come in", Which means you can use it to log into WebMail automatically without having to enter your username and password:
If in the section "Mailboxes"The login button opposite the desired mailbox is called"WebMail"Means the user of the mailbox independently changed password From him: In this case, it will not be possible to log in automatically, and after pressing the button, you will need to enter the name of the box and the current password (you will need to find out from the user of the box who changed the password).