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Outlook | Outlook for mobile | Outlook for iOS | For business
Using Outlook for iOS in business environments for email and scheduling
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Based on your description and the product tag, I understand that you're trying to sign in to your work or school account using Outlook for iOS.
To better understand your scenario, could you please share a screenshot of the screen where you're being prompted to enter the Domain? Before uploading it, please make sure to hide any personal or sensitive information, such as your email address or username.
Could you also let me know what type of account you're using (for example, Microsoft 365/Exchange, IMAP, or POP)?
In the meantime, if you're seeing a combined Domain\Username field, you can try entering your full email address. If Domain is shown as a separate field, you can also try leaving it blank and see if you're able to continue.
I look forward to your update.
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