synching outlookoutlook functions on my iphone but not on my laptop

Test the Outlook.com account in a browser first; if webmail works, repair or reset New Outlook on the laptop because the working iPhone does not require the Windows app to be healthy.

1. Test the account outside the Windows app

1. On the laptop, open a browser and go to Outlook.com.
2. Sign in using the Microsoft account password for the affected Outlook.com, Hotmail, or Live.com address.
3. Check whether you can open and send an email.

This separates an account-access problem from a New Outlook app problem ^1^.

• If webmail also says “Access denied”: complete any password or identity-verification prompt shown there. The Windows app cannot reconnect until browser sign-in succeeds.
• If webmail works: continue below; the mailbox is accessible and the laptop app/session needs attention.

2. Fully close and restart New Outlook

1. Right-click Start and select Task Manager.
2. Select Microsoft Outlook, then choose End task.
3. Confirm that no Microsoft Outlook process remains.
4. Reopen Outlook (new).

Microsoft documents this as the first startup recovery step for New Outlook ^2^.

3. Repair, then reset the app

If it still crashes or displays the denial message:

1. Open Windows Settings → Apps → Installed apps.
2. Find Outlook (new) and select Advanced options.
3. Select Repair, then try Outlook.
4. If Repair does not work, return to the same page and select Reset.
5. Open Outlook and sign in again with the Outlook.com/Hotmail/Live.com account ^1^.

Resetting removes the app’s local settings, so Outlook may require the account to be added again.

4. Reinstall if Outlook still will not open

1. Open Start and locate New Outlook for Windows.
2. Expand its options and select Uninstall.
3. Open Microsoft Store.
4. Search for Outlook for Windows, select Get, and then open it.
5. Add the Microsoft account when prompted.

Microsoft lists uninstalling and reinstalling as the next New Outlook recovery action ^2^.

Do not use classic-Outlook procedures such as creating a mail profile, running SCANPST, or disabling COM add-ins for this case. New Outlook has a different architecture and does not use the classic multiple-profile model ^3^.

If both browser access and the reinstalled app continue to show the denial, record the exact wording and any error code—without posting the email address or password—and contact Microsoft Support. The current New Outlook known-issues page does not list a matching widespread access-denied incident ^4^.

References

1. Outlook access denied, asking for password - Microsoft Q&A
2. Outlook for Windows not responding, hangs, freezes, or stops working
3. Architecture changes in new Outlook
4. Fixes or workarounds for recent issues in new Outlook for Windows ...