The Document Could Not Be Open For Editing A Microsoft Sharepoint Foundation
Microsoft Excel cannot access the file on SharePointYou may experience an issue that prevents you from opening Excel documents via SharePoint Online.
The Document Could Not Be Open For Editing A Microsoft Sharepoint Foundation Compatible
Lisa Chen1226 on Thu, 23 Jun 2016 06:09:18Hi drmccarty,Can you open the 10 documents from the office client?Does the issue exists in all 16 documents?It is suggested to use IE with SharePoint products for better compatibility.Please add the SharePoint 2010 site to the compatibility view in the Internet Explorer:Tools Compatibility View settings- Add your SharePoint website to the compatibility view. Or check the box 'display all websites in compatibility view'.Verify the “ Sharepoint OpenDocuments Class” add-on is installed and enabled. If it is not reinstall Office.Similar issue article for your reference:Protected View may result the problem, check the following articles:Best Regards,Lisa Chen.