How to Switch Outlook From Opera Mail?

Export Emails:
Open Opera Mail.
Select the folder (like Inbox, Sent, etc.) that you want to export.
Click on File > Export.
Choose the export format - typically, you'll want to export to EML format (if available) for emails.
Select a destination on your computer to save the exported emails.

Set Up Email Accounts: If you need to set up email accounts in Outlook, go to File > Account Settings > Account Settings. Click on “New” to set up your email account using your email credentials.
Adjust Preferences: Configure any additional settings in Outlook to suit your needs, like setting your signature, rules, etc.

Once the imports are complete, check to ensure all your emails and contacts have been successfully imported. Set up your email account and other Outlook preferences as needed.

If you have a complex folder structure, consider exporting emails from each folder and maintaining the hierarchy when importing into Outlook. Always ensure to back up your data before performing the export/import process.