Hi @Tony Zhou,
The error code AADSTS90044 usually indicates a problem with the authentication process when trying to sign in to an Azure Active Directory (AAD) account on an iPad. This error message may appear if the device is not managed by your organization's mobile device management (MDM) solution.
To resolve this issue, you can try the following steps:
- Check with your IT administrator to find out if your iPad is managed by your organization's MDM solution.
- Make sure your iPad is running the latest version of iOS and is fully updated.
- Try clearing the browser cache and cookies on your iPad and try to sign in again.
- Try signing in using a different browser, such as Safari or Chrome, to see if the problem persists.
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