Sync issue with contacts and calendars and Outlook

James Kohnke 0 Reputation points
2026-09-10T19:56:12.1233333+00:00

I've reinstalled office 365 64-bit and installed iCloud. However, when I turn on sync Contacts and Calendars, it appears to download everything but ends in an error: Your setup couldn't be started because of an unexpected error (0x800706ba). My iCloud Calendars and Contact folders appear on the left side, but when I select them it says "This set of folders cannot be opened. The information store could not be opened.

Microsoft 365 and Office | Other
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  1. Xavier-D 12,595 Reputation points Microsoft External Staff Moderator
    2026-09-11T01:58:22.4766667+00:00

    Hello James Kohnke,

    I’m sorry you’re having trouble setting up your iCloud contacts and calendars in Outlook.

    Since the iCloud folders appear but cannot be opened, please try these steps:

    1. Close Outlook and iCloud.
    2. Open Settings > Apps > Default apps, select Outlook, and make sure the available Outlook-related file types and protocols are associated with Outlook.
    3. Open Settings > Apps > Installed apps, select Microsoft 365, choose Modify, and run an Online Repair.
    4. Restart the computer, open Outlook once so that the default profile loads, and then close Outlook.
    5. Open iCloud for Windows, enable Contacts and Calendars, and select Apply again.

    Also check Control Panel > Programs and Features for any older Office installation. If more than one Office version is installed, it may interfere with the iCloud setup.

    If the error continues, could you confirm:

    • Are you using classic Outlook or new Outlook?
    • Was Microsoft 365 installed from the Microsoft Store or directly from your Microsoft account?
    • Does Outlook show the iCloud add-in under File > Options > Add-ins?
    • Are any older versions of Office still installed?

    These details will help determine whether the problem is with the Outlook profile, the Office installation, or the iCloud integration.

    Feel free reply back to this post if you need further assistance, I'll be happy to help.

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