You have SharePoint server(s) deployed that utilize cookies for authentication (Forms Based Authentication (FBA), FedAuth, Claims based auth).
SharePoint is configured to utilize session rather than persistent cookies.
You have Windows 7, Windows 8, or Windows 8.1 clients that are accessing SharePoint to
- Publish / Save/ Open / Copy Documents to or from a SharePoint server
Open Explorer View to a SharePoint document libraryOpen Explorer View to a SharePoint document library
When doing this you receive errors or symptoms similar to the following:
By design session cookies are not supported to be handed across processes. Therefore the cookies must be persistent for proper operation of Webclient service. There is no plan to change this behavior.
Please use the following white paper as a Guideline on how-to configure SharePoint with persistent cookies:
Implementing Persistent Cookies in SharePoint 2010 Products (white paper)
Note: Main difference between Session cookies and Persistent cookies are:
Persistent cookies are stored on the local drive and have an lifetime defined by the expiration date parameter (see Managing Cookies)
Persistent cookies have an expiration date. These cookies are stored in the local users account under Users\"username"\AppData\Roaming\Microsoft\Windows\Cookies directory, and the Users\"username"\AppData\Roaming\Microsoft\Windows\Cookies\Low directory for applications running under low privileges.
Session cookies are stored in memory and can be accessed only by the process that created them.
A session cookie can only be used by the process requesting it whereas a process is a container for a set of resources
used when executing the instance of the program.
RFC 2109 http://tools.ietf.org/html/rfc2109
RFC 2965 http://tools.ietf.org/html/rfc2965
RFC 6265 http://tools.ietf.org/html/rfc6265
Cookie reference http://msdn.microsoft.com/en-us/library/windows/desktop/aa384321(v=vs.85).aspx
Managing Cookies http://msdn.microsoft.com/en-us/library/windows/desktop/aa385326(v=vs.85).aspx
Windows Internals Book, 6th edition
Chapter 5 Processes, Threads and Jobs