If you are unable to access fileshare from the very same Windows Server 2012 R2 add security principal INTERACTIVE with read permission to sharing ACL.
Source: http://community.spiceworks.com/topic/339035-server-2012-folder-sharing-problem?page=1
If you are unable to access fileshare from the very same Windows Server 2012 R2 add security principal INTERACTIVE with read permission to sharing ACL.
Source: http://community.spiceworks.com/topic/339035-server-2012-folder-sharing-problem?page=1