When I access to Outlook Web App by safari web browser,
and click 'reply' button then Body of OWA screen go blank.

But rotate iPhone to landscape orientation and back it to portrait orientation,
OWA display normal mail edit page 'to' , 'cc' , 'subject' , 'message body'.

Anyone can help?

Hi,

Why don't you use Mail App to connect exchange server instead of using owa by safari browser?

And did your colleague's Iphone with same IOS version have the same issue?

Best Regards.