Unable to add outlook.com email on iPhone 5 with iOS 10.3 after reset

iPhone 5 running iOS 10.3 will not add outlook.com email after reset. Error message "Unable to verify account information" before any account information is inserted



[Re-Titled by Moderator]

Original Title: iPhone 5

iPhone 8

Posted on Dec 5, 2025 9:00 AM

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Question marked as Top-ranking reply

Posted on Dec 5, 2025 9:43 AM

Hi @Cranbourne76,


I know that’s frustrating — especially when the error appears before you can even enter your details. And @AlWeir is correct: Microsoft has raised its security requirements, and the iPhone 5 on iOS 10.3 can’t meet the newer Outlook.com login standards.


Because of that, Outlook.com accounts can no longer be added through the Mail app on this device. The only workable option now is to sign in through the Outlook.com website in Safari, since modern authentication is required for the app-based setup.


I hope this helps clarify what’s going on. Let us know if you need any other options.

2 replies
Question marked as Top-ranking reply

Dec 5, 2025 9:43 AM in response to Cranbourne76

Hi @Cranbourne76,


I know that’s frustrating — especially when the error appears before you can even enter your details. And @AlWeir is correct: Microsoft has raised its security requirements, and the iPhone 5 on iOS 10.3 can’t meet the newer Outlook.com login standards.


Because of that, Outlook.com accounts can no longer be added through the Mail app on this device. The only workable option now is to sign in through the Outlook.com website in Safari, since modern authentication is required for the app-based setup.


I hope this helps clarify what’s going on. Let us know if you need any other options.

Unable to add outlook.com email on iPhone 5 with iOS 10.3 after reset

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