OneNote Login Issue iOS

Question

OneNote Login Issue iOS

Wesley Herode 5

OneNote on my phone will ask me to sign-in, run through Microsoft authenticator and then return back to the same screen after. I cannot access any of my notebooks on the mobile app. Web app is fine through browser. Authenticator never prompts me for a code or anything. It just pops over to a white screen, then straight back to OneNote where the process repeats itself.

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Answer 1

Chris Duong 10,705 Microsoft External Staff Moderator

Hi Wesley,

Sorry you’re going through this issue with OneNote on your phone. I appreciate you sharing what happened and the details about being redirected to Microsoft Authenticator and then returned back to the OneNote sign-in screen.

Before we proceed, please note that forum moderators do not have access to user account settings and cannot assist with logging in, resetting passwords, or changing access rights. While we do not have access to internal systems or administrative tools required to resolve account-specific or backend-related issues but we’ll continue doing our best to support you within the scope of our responsibilities.

Since OneNote works through the web browser, your notebooks and account access appear to be working. This issue seems more related to the mobile app sign-in flow, cached credentials, or the Microsoft Authenticator broker session on the device.

Here are some steps you can try:

Update both OneNote and Microsoft Authenticator to the latest version from the App Store or Play Store.
Fully close OneNote and Microsoft Authenticator, then reopen OneNote and try signing in again.
Restart your phone, then try signing in to OneNote again.
If the issue continues, remove your account from OneNote if the app allows it, then sign back in.
If you are still stuck in the loop, uninstall and reinstall OneNote. After reinstalling, open OneNote and try signing in again.

Should the issue still continues after these steps, please reach out to your organization’s IT team for further assistance. They may need to check your Microsoft 365 sign-in logs, MFA registration, or any mobile access policies affecting OneNote. You can also share the steps outlined in the article Manage user authentication methods for Microsoft Entra multifactor authentication . This will help them assist you in resetting your MFA settings and restoring access to your account.

In case you do not know who is your IT admin, kindly refer to this article: How do I find my Microsoft 365 admin? - Microsoft Support

I hope this can be resolved soon. Should you have any further questions or need additional assistance, please feel free to share them in the comment below. I'm very happy to help. 

Thank you again for your patience and understanding.

If the answer is helpful, please click "Yes" and kindly upvote it.

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Hardee, Jordan 5 Reputation points

2026-07-31T17:58:43.3433333+00:00

Several users are having the same issue in our environment. We tried resetting the app in iOS settings, revoking user sessions, revoking MFA, uninstalling Authenticator and all other Microsoft apps, rebooting the phone, re-enrolling MFA and re-downloading/ installing OneNote and other iOS apps. Same sign-in loop. Some users are affected, others are not. Devices are fully up to date. Issue started around same time this question was asked. Definitely seems to be a Microsoft issue. My guess would be an update.
Wesley Herode 5 Reputation points

2026-07-31T18:34:45.4633333+00:00

Did the same thing with my IT department. Revoked MFA and signed out of all apps, etc. Issue persists. Can sign into other 365 apps just fine it seems.
Chris Duong 10,705 Reputation points Microsoft External Staff Moderator

2026-07-31T19:28:08.06+00:00
Hi Wesley,

Thank you very much for the update. I appreciate you confirming that your IT department already revoked MFA, signed you out of active sessions, and that the issue still persists.

Since you are able to sign in to other Microsoft 365 apps and OneNote works through the web browser, this no longer appears to be a general account access or MFA registration issue. Based on the behavior, it seems more specific to the OneNote mobile sign-in flow on iOS, especially where OneNote redirects to Microsoft Authenticator but does not complete the authentication process.

At this point, I would recommend having your organization’s IT team escalate this through the Microsoft 365 admin center so Microsoft Support can review the tenant-side sign-in logs, device and app details, and any possible service-side or app-related issue.

For detailed guidance on how to open a support ticket with Microsoft Support, please refer to: Get support - Microsoft 365 admin | Microsoft Learn

It would also be helpful for IT to include the following details in the support request:

OneNote iOS app version

Microsoft Authenticator version

iOS version

Device model

Approximate time of the failed sign-in attempts

Confirmation that OneNote Web works

Confirmation that other Microsoft 365 apps can sign in successfully

Any Entra ID sign-in log entries for OneNote or Microsoft Authentication Broker during the failed attempts

Whether multiple users in the organization are affected

For now, please continue using OneNote through the web browser as a workaround while your IT team investigates or escalates the issue.

I hope this issue gets resolved soon. Please contact if you need anything else.
Chris Duong 10,705 Reputation points Microsoft External Staff Moderator

2026-07-31T19:29:53.2133333+00:00

Hi Hardee,

Thank you for adding this information. Since multiple users in the same environment are affected and the issue persists even after resetting app data, revoking sessions, revoking MFA, reinstalling Microsoft apps, and re-enrolling MFA, this does point more toward a OneNote iOS app or authentication flow issue rather than an individual user MFA problem.

I would recommend opening a Microsoft support request from the Microsoft 365 admin center and including affected user examples, timestamps, OneNote and Authenticator version numbers, iOS versions, and Entra ID sign-in logs. This will help Microsoft Support determine whether there is a known issue, recent app regression, or tenant-specific authentication policy interaction affecting OneNote on iOS.

For detailed guidance on how to open a support ticket with Microsoft Support, please refer to: Get support - Microsoft 365 admin | Microsoft Learn

In the meantime, affected users may need to use OneNote on the web as a workaround while the issue is being investigated.

I hope this helps move this forward. Please contact if you need anything else.

Thank you again for your patience and understanding.
Hardee, Jordan 5 Reputation points

2026-07-31T19:35:22.2666667+00:00

It looks like there's a Reddit thread with people observing the issue as well: https://www.reddit.com/r/OneNote/comments/1v9sa58/onenote_mobile_ios_login_not_working_since/

Their summary: In our organization, we have at least three users where logging in to the OneNote mobile app on iOS does not work with the last version 16.112.2 (released 9h ago according to iOS AppStore version history).

Does anyone else experince this?

The logs pulled from iOS indicate that the OneNote app handles the authentication incorrectly after the user entered their credentials. The Entra ID logs show a successful authentication (Microsoft Authentication Broker). We're using MS Authenticator on the phones for authentication. Logging in to another MS application, e.g. Word, works flawlessly.