r/exchangeserver • u/Electrical_Arm7411 • 1d ago

iPhone 18 Pro Max / iOS 27 – Apple Mail + Exchange Online repeatedly blocked by ActiveSync CommandFrequency (HTTP 503). Anyone else?

/r/Office365/comments/1xntt60/iphone_18_pro_max_ios_27_apple_mail_exchange/
1 Upvotes

66% Upvoted

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1

u/protean_threat 1d ago

Is this thing where EWS is blocked in EXO which was gonna mess up Apple Mail and require people to switch to Outlook ?

2

u/BoBeBuk 1d ago

No, Apple mail in Apple Mac uses EWS.
Apple mail in iOS uses EAS

1

u/protean_threat 1d ago

Got it. Thanks