How to fix Samsung MFC scan to SMB "Authenticating user" "Account Error" error?

The not so Mac compatible (understatement, see the bottom of this question) Samsung MFC printers - for example the CLX-6260ND - do have an option to scan to an SMB share.

When setting up all devices (Yosemite Macs and Samsung) with fixed IP addresses, having created a new Mac share, created a new Mac sharing user, allow both read and write access on the Mac folder share, in Mac "Sharing Options" enabled Windows File sharing for the specified test users (including re-entering the password and noticing the warning message about the reduced security in the stored password mechanism), using "WORKGROUP" as the domain, having tried both SMB protocol version v2/3 (10.10 default) as well as SMB v1 using SMBconf, giving everyone read/write access to the shared folder, tried to connect as "Anonymous user" to the SMB share, the situation is still that the Samsung SyncThru Web Service SMB server Test results in:

1. Connecting To Server = OK


2. Authenticating user = Account Error


3. Result = Fail

Any suggestions how to fix this, and create a Scan from Samsung MFC to a Mac shared (SMB) folder?

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*) no Scan to Mac software, only Scan to PC, no (working) firmware update from Mac, not connecting "Easy print" software for Mac, failure to read the status of Samsung printer supplies from the Mac OS print queue, etcetera.