Error Another account in your organization is already signed in to this device. Try again with a different account.

Hi @Pedro Sendas de Moura Pereira,

Thank you for reaching out to Microsoft Q&A Forum.

Regarding the error Another account from your organization is already signed in on this device you encountered, it seems like your iPhone is experiencing an error where cached credentials or device associations are interfering with sign-in.

In order to understand more about what steps you've taken; I'd love to provide some questions to investigate further:

• Are you trying to use the same Office 365 A1 account across all apps (Outlook, OneDrive, Excel, Word, Copilot) on your iPhone?
• When you say “restored,” did you restore from a backup or perform a full factory reset?
• Have you tried signing out of all Microsoft apps and removing the device from your account via the Microsoft 365 admin portal (if accessible)?

In the meantime, I'd recommend you try the following steps to troubleshoot this error

First, let's reset Office apps following steps mentioned below and verify whether issue re-occurs.

1. Close all the Office apps.
2. Go to iPhone Settings.
3. In Settings, tap to select one of your Office for iPhone apps such as Word, Excel, or PowerPoint.
4. Under RESET, tap Reset<app name>**.
5. Slide to enable Delete Login Credentials.
6. Start one of your Office for iPhone apps.
7. Sign in using your Microsoft account.
8. Now exit and try opening the Office apps and verify the result.

You can also check for multiple accounts signed into iOS under Settings > Mail > Accounts and remove any old school/work accounts.

Since this is happening on your iPhone after a restore, cached credentials may still be lingering in iCloud Keychain or app data. As the next step, you should clear credentials cache on your phone. But unlike Android phones, iPhones don’t have a straightforward option to clear the app cache. The only way forward is to delete the app after signing out of every Microsoft applications and reinstall them one by one.

1. Go to Settings > General > iPhone Storage.

1. Find Microsoft applications.
2. Tap each app and choose Delete App (not just offload).

1. Restart your iPhone.
2. Reinstall the apps from the App Store.
3. Sign in again with only your education account.

If the issue persists, please ensure your device is not registered multiple times in Azure AD. You have to use your admin account to verify this.

Note: Please understand that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution. 

I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this. 

Thank you for your patience and your understanding. If you have any questions, please feel free to reach out. 

I'm looking forward for your reply.

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