Issue
When you close Excel, it may crash if you're using the ProjectWise Integration Module for Office 365 Add-in version 10.00.03.906 or earlier.
Solution
You can prevent this by installing version 10.00.03.907 (or later) of the module. Learn more about getting this version from the ProjectWise website.
Once have it installed, be sure to add it to Excel using the instructions found here: