I can’t use national characters in my password.
You use national or language specific characters in your username or password. After creating your account or changing your password, you are unable to connect to your mail account.
Only certain characters may be used in the username. For more information refer to Creating user accounts in Kerio Connect.
If the password contains national characters, some mail clients will not be able to connect to Kerio MailServer. It is therefore recommended to use only ASCII characters for user passwords.