I have a problem I have never seen before in SharePoint 2010. I created a document library workflow which runs and sends notifications (emails) to its participants. The emails contain some text and a link to document (Microsoft Word Document) which is stored in the document library.
When the participant(s) open the document from email by clicking on that link, the document looks fine (When they save and review, there are 2 buttons, Edit this Task and Edit this Document) on Microsoft Word. There is also no problem when participant tried to open the document directly via document library.
But when the participant(s) tried to open the document via Tasks List, the Edit this Document button is not showing in Microsoft Word. I've already checked the URL which refer to the document in email, document library, and tasks list, and all of the URLs are the same URLs.
I've also checked the permissions of the participants (which is sufficient), and also tried to open that document with account which has full control permission, and even site collection administrator, but the same thing happened.
Were there anyone facing the same problem? And what is the cause and solution to this problem?