Open Outlook and select File.

Use the dropdown under Account Information to select the account you want to change.

Select Account Settings.

Select the Server Settings.

Select either Incoming mail and put the following:

If the account is set to POP3, change it to: pop.fusemail.net port 995 with SSL/TLS

If the account is set to IMAP, change it to: imap.fusemail.net port 993 with SSL/TLS

For the Outgoing mail, change it to: smtp.fusemail.net port 587 with TLS or port 465 with SSL

When you're done updating your settings, select Next > Done.