Error when attempting to add MS office calendar to Apple calendar app on Macbook

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Level 1

16 points

Error when attempting to add MS office calendar to Apple calendar app on Macbook

Since the iOS 27 upgrade, I get an error when adding MS office calendar account on my MacBook. I've attached the screenshot. This isn't an issue on my iPhone. I've had to subscribe to the MS calendar instead, but that means I only see all my ms appointments as "busy" in my iOS calendar. And it also means all the MS appointments are doubled on my iPhone.

I've tried adding the account on the calendar app, and through internet accounts in settings and I get the same error.

MacBook Pro 16″, macOS 27.2

Posted on Nov 2, 2026 5:07 AM

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Answer 1

razmee209

Level 10

205,144 points

Nov 2, 2026 11:48 AM in response to mmlebmac

mmlebmac wrote:

Since the iOS 27 upgrade, I get an error when adding MS office calendar account on my MacBook. I've attached the screenshot. This isn't an issue on my iPhone. I've had to subscribe to the MS calendar instead, but that means I only see all my ms appointments as "busy" in my iOS calendar. And it also means all the MS appointments are doubled on my iPhone.

I've tried adding the account on the calendar app, and through internet accounts in settings and I get the same error.

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