Uuden Outlook on Windowsin käyttäminen henkilökohtaista sähköpostia, kalenteria ja yhteystietojen hallintaa varten
Hello Kristiina,
You mentioned that this started after your email service provider made changes to their servers. That's an important clue. It's possible that the email account configuration in Outlook is no longer correct, which is why Outlook cannot connect to the server.
Think of Outlook like a telephone. You enter a phone number, and the telephone connects you to that number. If the other person's phone number changes, the call won't go through. That doesn't mean your telephone is broken, so repairing the telephone itself won't fix the problem.
The same idea applies here.
I understand that webmail is still working, but Outlook connects to your email provider through protocols such as IMAP/SMTP or Exchange. Think of it like entering the same house through a different door. Just because one entrance works doesn't necessarily mean the others do.
In this case, I would recommend contacting your email service provider and asking them to review your Outlook account configuration with you.
They should verify that you're using the correct account type (IMAP or Exchange), incoming and outgoing server addresses, port numbers, SSL/TLS encryption settings, and authentication requirements.