Using Outlook for iOS in business environments for email and scheduling
I found this on another site. The person shut the WiFi on the iPhone off then added the email back onto his iPhone. Turned the WiFi back on and the email stayed on the iPhone. It worked for me to add my Outlook back on my iPhone, but it's still not syncing. Now that I have the account back on my phone, hopefully once the problem is solved, it will automatically sync.