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Outlook | Windows | Classic Outlook for Windows | For business
Using classic Outlook for Windows in business environments
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Technically, New Outlook and Classic Outlook are 2 separated apps, they do not sync to each other. They will sync with the accounts set up in the app.
If you see the new emails in New Outlook but not in Classic, it indicates Classic Outlook is having a synchronizing issue.
May I ask which type of account are you using? Exchange, IMAP or POP?
You can try:
- Go to Send/Receive tab, click Update folder, does any error show up? If yes, please provide it.
- Remove and re-add account.
- Rebuild .ost file: Close Outlook > Press Windows + R > Type in %LOCALAPPDATA%\Microsoft\Outlook\ > Look for your email address and delete it > Restart Outlook.
- Reinstall Classic Outlook.
Please try and let me know how it goes. I look forward for your reply.
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