New App version for iOS is in a login do-loop

Justaskingquestions 0 Reputation points
2026-08-18T18:56:14.7866667+00:00

Takes to sign in page, signs in, clears, comes back to app still on sign-in page.

Microsoft 365 and Office | OneNote | Other | iOS
0 comments

2 answers

Sort by: Oldest
Most helpful Newest Oldest

  1. AI answer

    2026-08-18T18:56:30.3466667+00:00

    For an iOS Microsoft 365 app sign-in loop, the supported fixes depend on which app is affected:

    1. Update the app to the latest App Store version.
      • For Microsoft 365 iOS apps managed with Intune MAM, repeated sign-in prompts and unexpected sign-outs were addressed in newer app updates.
    2. After updating, sign out and sign back in, then restart the app or device and test again.
      • This is the documented next step for the known iOS sign-in loop issue in Microsoft 365 apps.
    3. If the issue is in OneNote, clear the stored Office credentials on iOS.
      • Go to iOS Settings > OneNote > Reset OneNote > Delete Sign-In Credentials and turn it on.
      • Fully close OneNote.
      • Reopen OneNote and sign in again.
      • Note: Office apps share identity state, so updating Word, Excel, and PowerPoint first is recommended before clearing OneNote credentials.
    4. If the app uses MSAL for iOS and the loop happens after successful sign-in, check whether the app is using a browser configuration that does not allow cookie sharing.
      • Repeated sign-in prompts in MSAL-based iOS apps are typically caused by the web browser used by MSAL not allowing cookie sharing.
      • Safari system browser is the default for interactive authentication and supports SSO state sharing.
      • Custom browser options such as SFAuthenticationSession, SFSafariViewController, ASWebAuthenticationSession, or WKWebView can cause cookie-sharing problems.

    If this is specifically a newly updated Microsoft 365 iOS app, the most direct path is: update the app, sign out, sign back in, restart, and retest. If it is OneNote, also clear the OneNote sign-in credentials as above.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

    Was this answer helpful?

  2. Kai-H 26,665 Reputation points Microsoft External Staff Moderator
    2026-08-19T07:32:42.52+00:00

    Hi, Justaskingquestions

    This behavior appears to be a problem in the latest OneNote for iOS sign-in flow rather than an incorrect password, especially when authentication completes successfully but the app returns to the same page.

    Besides the solutions provided by the Q&A Assist, here are some suggestions you can try: 

    As a temporary workaround, open Safari, sign in at Microsoft 365, and use OneNote on the web. You can also open the notebook from OneDrive or SharePoint in Safari.

    If you have Word, Excel, Outlook, or OneDrive installed, sign in to the same account there first. Then return to OneNote and try again. This can re-establish the shared Microsoft account session used by the apps.

    For a work or school account, ask the Microsoft 365 administrator to check Service health for OneNote advisories. This is important because repeated local resets may not help with an app-side issue.

    From OneNote’s sign-in screen, use the feedback option if available and include the app version, iOS version, and the approximate time of the failed sign-in. Diagnostic details can help identify the affected session.

    For now, using OneNote in Safari is the safest workaround while waiting for the corrected App Store release.

    Thank you for your patience in reading, I hope this information has been helpful to you. 

    If the answer is helpful, please click "Yes" and kindly upvote it. If you have extra questions about this answer, please click "Comment."    

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread. 

    Was this answer helpful?

    1 person found this answer helpful.

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.