Using Outlook for iOS in business environments for email and scheduling
Hi sammary,
We appreciate you raising this concern to our attention. We understand that you are having trouble with sending emails with attachments and calendar invites using Outlook for iOS. However, since you're using an Exchange account/server, it would be best to post this query to our TechNet forum page. This can help you get the most qualified pool of respondents and other partners who regularly read the forums.
Should you have further questions, please let us know.