Why does the app show a blank screen on iPhone after Azure AD login, while it works fine on desktop?

Question

Why does the app show a blank screen on iPhone after Azure AD login, while it works fine on desktop?

Valentino 0

We are using Azure App Service to host the frontend of the application. The user is experiencing an issue on an iPhone where, after logging in, the application loads but displays a completely blank screen. He has cleared the cache on his phone and even tried logging in from a different mobile device. He is able to log into the application, but once inside, nothing is displayed. The same credentials work fine on a desktop computer, and he has also tried using multiple browsers on the mobile device, with the same result.

Could you please advise on how we might resolve this issue?

Carolyne 1,151 Reputation points Microsoft Employee

2026-02-02T12:14:33.0966667+00:00

I would suggest you check the browser console via Safari Web Inspector for JavaScript/runtime errors, verify the app does not rely on third‑party cookies or unsupported APIs on iOS, and ensure polyfills and mobile‑compatible builds are enabled. Also validate redirect URLs, SameSite cookie settings, and test with Safari Intelligent Tracking Prevention disabled to isolate the cause

Your answer

Carolyne 1,151 Reputation points Microsoft Employee

2026-02-02T12:14:33.0966667+00:00

I would suggest you check the browser console via Safari Web Inspector for JavaScript/runtime errors, verify the app does not rely on third‑party cookies or unsupported APIs on iOS, and ensure polyfills and mobile‑compatible builds are enabled. Also validate redirect URLs, SameSite cookie settings, and test with Safari Intelligent Tracking Prevention disabled to isolate the cause