icloud data file not available

Hi there SManning42,

According to Microsoft's support documentation, you have to use Outlook on the web to sync iCloud calendars:

Currently, Outlook for Mac doesn't support the CalDAV or CardDAV Internet standards. This means Outlook for Mac does not sync your iCloud Calendar or contacts when you add your iCloud email account. That being said, there is a way to sync your iCloud calendar with Outlook for Mac—you can subscribe to your iCloud calendar to Outlook on the web (Outlook Web Access), and once you do that, the subscribed iCloud calendar automatically syncs with Outlook for Mac.

Have a look at this Microsoft link for more information on how to do that: Sync your iCloud calendar with Outlook for Mac

If you still can't add your calendar to Outlook, try these steps to see if they resolve the issue for you:

Things to check first

1. Check that your PC meets the iCloud system requirements and is connected to the internet.

2. Download iCloud for Windows and sign in with your Apple ID. If you have multiple Apple IDs that you use with iCloud, check that you're logged in to iCloud for Windows with the same account that you use on your other devices. 

3. Check the System Status page for any known issues affecting iCloud Mail, Contacts, or Calendars.

4. Make sure that the date and time settings on your PC are correct.

5. Make copies of the information you store in iCloud.

Seeing duplicate calendars or duplicate contacts? Learn how to remove duplicate calendars or remove duplicate contacts. 

To set up iCloud Mail in Outlook or if you don't use iCloud for Windows, set up two-factor authentication for your Apple ID and sign in to Outlook with your Apple ID user name and an app-specific password.

You'll find the information above and more steps to try in this link: If you can’t add iCloud Mail, Contacts, or Calendars to Outlook - Apple Support

Take care.

Hi SManning42,

We appreciate those details.

Since you are still having issues after following those steps, reach out to Apple Support directly, as this may require closer guidance: Get Support

Cheers!