Problem using an Outlook account with the Mac Calendar app.

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Problem using an Outlook account with the Mac Calendar app.

I’m trying to use the Mac Calendar app with my @outlook.com account.

First, macOS doesn’t offer a direct option to add an Outlook.com account — only Exchange. So, I had to configure my @outlook.com account as an Exchange account.

Then, when I create an event in the Mac Calendar app, the time remains visible, but the event title disappears after a few seconds. The same happens if I try to change the time of an existing event — the event title is erased.

This issue caused by the Mac Calendar app also impacts the calendar on the Outlook.com website.

Interestingly, the problem occurs only on the Mac — the Calendar app on my iPhone works perfectly with my @outlook.com account.

I would truly appreciate any insights or guidance.

Thank you!

MacBook Air 15″, macOS 15.5

Posted on Jul 1, 2025 7:12 PM

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Answer 1

Top-ranking reply

Barney-15E

Level 10

122,120 points

Jul 2, 2025 4:16 AM in response to Penelope7809

Microsoft has two protocols for communicating with Exchange, Exchange Web Services (EWS) and Exchange Active Sync (EAS). EAS was designed for mobile devices and is only licensed to be used on mobile devices. For desktop computers, clients must use the flawed EWS protocol. if Outlook.com uses the CardDAV and CalDAV open standards, you may be able to set it up as an Other account type and add the calendar and contacts capabilities in the Internet Accounts System Settings.

You would probably have to turn off the Exchange options in your Outlook account before adding it, otherwise it’ll just recognize it as an Exchange account.

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