Sync outlook to iPhne SE

Hello PeterF99,

We appreciate the update. For Outlook 2007, it may be worth trying these steps: If your iCloud Contacts, Calendars, or Reminders won’t sync

"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.

In Outlook 2007:

1. From the Tools menu, select Trust Center.
2. Select Add-ins from the left column.
3. In the list of add-ins in the Active Application Add-Ins section, 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, select File > Info > Account Settings > Data Files. If iCloud is the default account in the Comments column, select a different account, and click Set as Default.
• In Outlook 2007, select File > Data File Management > Data Files. 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."

I hope that helps.

Take care.

Hello PeterF99,

Thanks for replying. It sounds like it might help to remove and then reinstall the iCloud for Windows app with the steps here: Set up and use iCloud for Windows

"Turn off or uninstall iCloud for Windows

If you turn off a service in iCloud for Windows, your information won't automatically stay up to date in iCloud, and you won't see updates made on your other devices. Follow these steps to turn off a service or iCloud:

• To turn off a service on your PC, Open iCloud for Windows, then select or deselect that service. To save your changes, click Apply. 
• To turn off iCloud for Windows, open iCloud for Windows, then sign out. 

If you want to uninstall iCloud for Windows, remember to make a copy of your iCloud data and save it on your PC. Then sign out of iCloud for Windows on your PC, and follow these steps:

Windows 8 or later:

1. Go to the Start screen, right-click in the bottom-left corner or click, then select Control Panel.
2. Click Uninstall a Program.
3. Click iCloud > Uninstall.
4. When asked to confirm, select Yes.

Windows 7:

1. Choose Start menu > Control Panel.
2. Click Programs > Program and Features.
3. Select iCloud > Uninstall.
4. Click OK to continue."

If this doesn't resolve the issue, get in touch with Apple directly with this link: Contact Apple Support

Take care.

Hello PeterF99,

Thanks for the post in Apple Support Communities. I understand you may be having an issue with syncing Outlook calendars.

There are a number of possibly helpful steps found in this link: Get help using Outlook with iCloud for Windows. I recommend giving these a try to see if they resolve the issue.

Feel free to post back with an update if needed.

Have a great day.