how can I synchroise my iphone calendar with microsoft outlook 365

Question

how can I synchroise my iphone calendar with microsoft outlook 365

Ian Essai 0

I have just installed Windows 11 and the associated Office 365. I use an iPhone and want to sync the iPhone Calendar with Microsoft Outlook.

I have followed the instructions and installed iCloud, but the options at the 'Mail, Calendar and Contacts is black i.e. there is no >?

2 answers

Your answer

Answer 1

Hi Ian,

The iCloud for Windows integration with Outlook depends on a few key conditions:

Outlook must be the desktop version from Microsoft 365, not the Microsoft Store app.

iCloud for Windows must be up to date and signed in with your Apple ID.

Outlook profile must be fully configured before iCloud can detect it.

If the option is blacked out, it usually means:

iCloud cannot detect a compatible Outlook installation.

Outlook is still running in the background during setup.

The account setup in Outlook hasn’t completed yet.

What You Can try is:

Close Outlook Completely

Exit Outlook and check Task Manager to make sure no Outlook processes are running.

Confirm Outlook Installation Type

iCloud only works with the click-to-run version from Microsoft 365. If you installed Outlook from the Microsoft Store, uninstall it and reinstall from office.com.

Update iCloud for Windows

Download the latest version from Apple’s official site.

Repair Office

Go to Settings > Apps > Microsoft Office > Modify > Quick Repair to ensure Outlook is properly registered.

Restart and Try Again

After these steps, open iCloud and check if the Mail, Contacts, Calendars option is now available.

Let me know how it goes, Happy to help!

Answer 2

Ian Essai 0

Thanks Harold,

This is a new laptop and when I signed in it installed the Microsoft Office. I installed the latest iCloud

I'm not sure what Outlook and how to check?

Appreciate any advice :)

Ian

Harold Milan 5,075 Reputation points Independent Advisor

2025-10-23T19:16:05.35+00:00

I completely understand how confusing this can be, especially on a brand-new laptop where everything feels fresh but unfamiliar. You're doing all the right things by installing iCloud and trying to sync your iPhone calendar with Outlook.

The iCloud integration with Outlook depends on detecting the correct version of Outlook specifically, the full desktop version that comes with Microsoft 365. Sometimes, Windows 11 installs the Microsoft Store version of Outlook by default, which unfortunately doesn’t support iCloud syncing. That’s likely why the “Mail, Contacts, Calendars” option in iCloud appears blacked out or inactive.

How to check your Outlook version:

Here’s a quick way to confirm:

Open Outlook.

Go to File > Office Account > About Outlook.

Look for the version info if it says “Microsoft Store,” that’s the limited version. You’ll need to uninstall it and reinstall the full version from office.com.

What to do next:

Uninstall the Microsoft Store version of Outlook (if that’s what you have).

Reinstall Outlook from office.com using your Microsoft 365 subscription.

Open Outlook and set up your email account so it’s fully configured.

Close Outlook completely, then open iCloud again and check if the sync options are now available.

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how can I synchroise my iphone calendar with microsoft outlook 365

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