Iphone reminders sync with Outlook

Hi jgies,

Thanks for those details. Were you able to try these specific steps in the resource?

"Microsoft Windows 

After each step, check your contacts, calendars, or reminders.

Reminders are called Tasks in iCloud for Windows.

Refresh Outlook

Click Refresh  in Outlook.

Turn off iCloud Contacts, Calendar, and Tasks, then turn it back on

1. Open iCloud for Windows.
2. Deselect Mail, Contacts, Calendars and Tasks, then click Apply.
3. Wait a few seconds, select Mail, Contacts, Calendars & Tasks, then click Apply.
4. Open Outlook.

Make sure the iCloud Outlook Add-in is active

In Outlook 2010 and later:

1. Click the File menu.
2. Click Options in the left panel.
3. Click Add-Ins in the left panel of the Outlook Options window.
4. Look at the list of add-ins in the Active Application Add-Ins section.
5. Select the iCloud Outlook Add-in.

Learn how to manage Add-ins with Microsoft Outlook.

Check your default account in Outlook

In Outlook 2010 and later:

1. Click the File menu.
2. Select Info > Account Settings > Data Files. 
3. If iCloud is the default account in the Comments column, select a different account, and click Set as Default.

Restart your computer

After you restart your computer, see if you fixed the issue."

If so, contact Apple Support for further assistance.

Takecare.

Hi jgies,

Thank you for using Apple Support Communities. We understand that Reminders are not syncing between your iPhone and Windows and we'd like to help.

We think the steps here may help with this: If your iCloud Contacts, Calendars, or Reminders won’t sync - Apple Support

We hope this helps.

Cheers!