Issue:
Not able to import excel spreadsheet into Office 365 site.
Solution:
Add Office 365 SharePoint site to trusted sites in Internet Explorer the sims 2 for free.
Here is How to Add SharePoint Site to Trusted Sites Zone:
Go to Internet Explorer >> Click on “Tools” Menu >> Internet Options >> Security >> Trusted Sites >> click on “Sites” button and Enter the URL of your SharePoint Site >> Click on “Add” spiele herunterladen ohne passwort.