This is a thear basically with the same problem as descibed in: http://social.technet.microsoft.com/Forums/en-US/45f11013-3e03-4b3b-afa0-743131c479f0/ricoh-aficio-mp-c2051-scan-to-folder-windows-server-2012-error-authentication-with-the
But, the new firmware does not solved the problem. It´s hard to find the firmware for download, where they get the firmware/ How can we know the latest firmware for ricoh printers?
We tried to disable SMB2/3 and does not solve too.
I heard about a problem related to 128 bits encryption, but i´m not confident in this solution, because since 2003, 128 bits encryption is very common, maybe reduce the security level for LAN manager, SMB can help?