sign in failed company outlook mobile app on honor magic V3

Ahmed Desouky 25 Reputation points
2025-09-14T22:55:47.12+00:00

Screenshot_20250915_122021_com_microsoft_office_outlook_MAMStartupActivity.jpgI am unable to use Outlook, Teams, and Edge properly on my Honor Magic V3 personal device with my corporate Microsoft 365 account. Outlook works only temporarily after login (with OTP and PIN), then stops syncing and shows “Sign-in failed / Retry / contact your IT department.” My company IT confirmed it may be due to Microsoft not supporting Honor devices. Please confirm if Honor devices are unsupported and if there is any workaround.

Full Details:

Hello,

I am facing an issue with the Outlook mobile application on my device Honor Magic V3. This is my personal phone, but I use it to access my corporate email, which is licensed under Microsoft 365.

Here is what happens:

When I install the Outlook app and begin the login process with my company email, the app requires me to download the Intune Company Portal. My company IT team advised me not to open or sign in to Intune, so that the Outlook setup can complete normally.

  • After entering my email and password, I proceed with the second step of authentication (OTP). Once I enter the OTP, the app then asks me to create or enter a PIN code for additional security.

Initially, everything works perfectly — the mailbox syncs correctly, I can send/receive emails, and I receive notifications.

However, this works only temporarily. After a short period, or whenever I exit the app, it completely stops syncing. I can no longer send or receive emails unless I uninstall and reinstall Outlook again.

When I re-open the app in this state, a small window appears that says: “Sign-in failed”, with an option to Retry. The message also says: “If the problem continues, contact your IT department.”

What I already tried (based on my company IT team’s guidance):

Cleared cache, cleared data, reinstalled the application multiple times.

Restarted the device, changed internet connection (Wi-Fi/Mobile Data).

Adjusted all settings related to background data, battery optimization, and app permissions.

Followed every troubleshooting step provided by IT.

Unfortunately, nothing worked. My IT department confirmed that the issue is related to Microsoft not supporting Honor devices for security reasons.

Additionally, Microsoft Teams and the Edge browser are also not functioning properly on my device, which makes me think the problem is broader than just Outlook.

Could you please confirm if Microsoft officially does not support Honor devices like Honor Magic V3? And if there is any workaround or upcoming support plan?

Thank you,

Microsoft Security | Intune | Microsoft Intune Android
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  1. PHUOC AN TRAN 5 Reputation points
    2025-12-13T11:35:52.0433333+00:00

    I have the same issue with my Honor V5. This is the big problem with all Honor device and need to MS fix it early.

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  2. Bogdan Piperea 5 Reputation points
    2025-12-09T13:47:26.9933333+00:00

    Hello!

    I have same issue with an Honor 90 device, REA-NX9 model! I can`t sign in to Outlook on this device! After I reinstall the Outlook (because it doesn't sync anymore) and tried to sign in I receive an error (without asking me tha password or something)

    The error I received:

    Tag: 5nlhg

    Code: 1668537278

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  3. Ryan 0 Reputation points
    2025-12-10T01:21:16.8+00:00

    one short term workaround from having to reinstall is to clear data on outlook, wait a while, reopen authenticator and company portal, then open outlook to re-add back the account. this works for a while until it signs out, and you have to re-execute the above again. @Microsoft. please help address this asap.

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  4. Prathista Ilango 1,080 Reputation points Microsoft Employee
    2025-09-16T15:17:57.6833333+00:00

    Hello Ahmed Desouky,

    Please follow the steps below to help isolate and resolve the sign-in issues observed on HONOR devices:

    1. Check Android Enterprise Recommended Status: To verify if your device is Android Enterprise Recommended, visit the official directory and search for your device model: Android Enterprise Recommended Devices https://www.honor.com/global/tech/security-update/?utm Note: Not all HONOR devices are listed. Lack of Android Enterprise Recommended certification may result in limited compatibility with certain enterprise features.
    2. Confirm OS Compatibility with Microsoft Intune: Ensure the Android OS version on your device is supported by Microsoft Intune. You can check the supported operating systems here: Operating systems and browsers supported by Microsoft Intune | Microsoft Learn Intune generally supports Android 10.0 and above for full user-based management. Older versions may not support all features.
    3. Disable Battery Optimization (if enabled): To rule out potential issues related to update or app delivery, disable Battery Optimization on the device if it is currently enabled.
    4. Test on a Different Device: There have been known issues reported specifically with HONOR devices during Intune sign-ins. To narrow down the issue further, test the same scenario on a different make/model that is known to be Android Enterprise Recommended and running a supported Android OS version. If the issue is not reproducible on the alternate device, it may indicate a device-specific or OEM-related compatibility issue.
    5. Contact Microsoft Support (if further assistance is needed): If the issue persists after following the above steps, please contact Microsoft support through the Intune Admin Center: Get support in the Microsoft Intune admin center - Microsoft Intune | Microsoft Learn

    Hope this helps!

    If you found the information above helpful, please Accept the answer. This will assist others in the community who encounter a similar issue, enabling them to quickly find the solution and benefit from the guidance provided.

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  5. Ahmed Desouky 25 Reputation points
    2025-09-15T08:56:50.33+00:00

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