I tried to address this in the article, but it's a little confusing. If you and a coworker are both editing a document using native versions of Office, then th

I tried to address this in the article, but it's a little confusing. If you and a coworker are both editing a document using native versions of Office, then the changes should sync seamlessly. If you create a document using Office, then sync to the cloud, then edit that document using a Google Docs web-based editor, it should look right, but there may be some fidelity issues. However, any changes you make WILL NOT be saved to the version of the document that was originally created in Office. You can still save this as an Office Doc using the export feature, but it breaks the syncing.