Office Developer: Difference between Office Web addin vs COM/VSTO addin

COM or VSTO add-ins are earlier Office integration solutions that run only on Office for Windows. The major difference what you see is that COM addins will be running in the user device or in the Office Client. The new Office Add-ins don’t involve code that runs on the user’s device or in the Office…


Understand more about Office.js, it’s add-in runtime environment and Internet Explorer protected mode!!

In addition to the earlier blog post, you can refer the following: – Microsoft Office addins using the Apps for Office platform are designed to run in isolation, using a low rights sandbox. – Several features, such as the task pane view, use web views provided using Internet Explorer APIs.  – To ensure these components…