Today, we are excited to announce the availability of OWA for iPhone and OWA for iPad, which provides even more value to organizations on any Office 365 subscription that includes Exchange Online. ...
Updated Jul 01, 2019
Version 2.0
Blog Post
Andrew N,
Yes, it does work for Federated domains. I just tested against an identical setup which matches with the setup details that you have provided, the App is working to connect to the mailbox hosted in Office 365/Exchange Online (Cloud). For my setup, I don't have the autodiscover records published for my federated domain/tenant, so if I try to configure my account in the App, which uses autodiscover to pull up my mailbox info, it fails to connect with the usual error. So I then use the Advanced Settings option (provided in the same error message) to setup my account in the App. I provided full SMTP e-mail address (user@contoso.com) in the User name field, outlook.office365.com as Server name, left the Domain field empty & checked the SSL box - it connected right away! I can then use the App as expected connected to that mailbox.