Managing personal Outlook.com account settings, security, and privacy
I feel for everyone also experiencing this same frustrating problem. The only "solution" that I have been utilizing is to forward any of my outlook/hotmail emails with attachments to my gmail account in order to open & view the attachment. Gmail opens the attachments without a problem. I realize that this is a cumbersome "solution", but after reading about all of these people experiencing the same frustrating problem with their mobile outlook/hotmail accounts, Microsoft has yet to offer us all a better solution. Forward emails with attachments to a gmail account for now. Hope this tip helps. Also hope Microsoft fixes this problem soon!