I have a problem, where if I open a document from SharePoint Document Library, I couldn't edit it locally, the file requires to be saved locally. I cannot Checkout/Checkin, cannot edit it. It just says "[Read-Only]". Note that permission and settings has been checked properly.
Monitoring the traffic between my computer and the SharePoint server, I noticed that I am missing some HTTP Headers that are needed for Office Client to be able to do document editing.
I am missing the following HTTP Headers from the server:
So subsequently, the Office Client will not use the document editing mechanism, instead it is downloading the document for local copy.
I have read the following article https://msdn.microsoft.com/en-us/library/dd906383(v=office.12).aspx but at step #9 the server is not sending these HTTP Headers. What could possibly go wrong? Is it a client problem? I tried to checkout the document from another
network region with success result, so I don't think it is a server related problem, however I am stuck in where to start troubleshooting this problem.
Could someone points a direction to me where to start looking into this problem more thoroughly?
Edit: some additional info
SP: 2013 Office: 2016 IE: 11