I haven't been able to sync my email this week because our internet service provider changed the requirements to login to use the entire email address for the username. My account has been setup with the name before the "@" sign for 6 years and now that will not work. I tried to edit it on my S10 in the server settings for the Samsung email software (version 18.104.22.168) but "User name" is not an editable field. I don't want to delete the account and recreate it because I will lose local copies of the email.
What can I do?