Using classic Outlook for Windows in business environments
Hi, I'm Diane and I'm happy to help you today.
That is not the correct server name for outlook.com pop access. Adding the account as an Exchange is recommended. If you want or need to use pop, the pop (and imap) settings are in the article - https://support.microsoft.com/office/pop-imap-and-smtp-settings-for-outlook-com-d088b986-291d-42b8-9564-9c414e2aa040
Is Outlook opened? If so, go to Go to File > Account Settings > Account Settings. On the Email accounts tab, delete the outlook.com pop account. If you oultook.com email, click Add account and add it back - auto account set up will add it back as an exchange account.
If Outlook won't open (it should - click Cancel on the dialog a couple of times or so) - open Control panel, find Mail (Microsoft Outlook) - then click Email accounts button and edit or delete the outlook.com account.
Let me know how it goes, I'm here to help you further if needed.
-- Diane