User level: Level 1 (16 points)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.
Posted on Nov 2, 2026 5:07 AM
User level: Level 10 (205,348 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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Exchange Web Services (EWS) Block: Microsoft is phasing out the legacy Exchange Web Services (EWS) protocol in favor of modern APIs
Originally posted at discussions.apple.com/thread/256387508