There could be several reasons why your iPhone Office 365 is unable to verify account information, including:
- Incorrect login credentials: Make sure you are entering the correct email address and password associated with your Office 365 account.
- Poor network connection: Check to see if your iPhone is connected to a stable internet connection as a poor connection can prevent Office 365 from verifying your account information.
- Two-factor authentication: If you have enabled two-factor authentication for your Office 365 account, make sure you have set it up correctly on your iPhone.
- Outdated Office 365 app: Check to see if there is an update available for the Office 365 app on your iPhone. If there is, download and install the update to see if it resolves the issue.
If none of these solutions work, you may need to contact Microsoft support for further assistance.