Hi,
According to your discription, it seems to be office issue. So I suggest that you can post it in office forum where you can get it better answers.
https://social.msdn.microsoft.com/Forums/office/en-US/home?forum=appsforoffice
In addtion, please refer to the office.js which might can help you:
https://msdn.microsoft.com/en-us/office/dn848361.aspx
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
Click
HERE to participate the survey.