A v tom manage accounts u tej mail app to konto je?
https://www.tenforums.com/tutorials/6135-add-delet e-account-windows-10-mail-app.html
https://support.office.com/en-us/article/Set-up-em ail-in-Mail-for-Windows-10-7ff79e8b-439b-4b47-8ff9 -3f9a33166c60
samozrejme neklikas na add, to je len priklad.