Finally found it at Samsungs site:
How To Reset Your SyncThru Password For A Printer With No Display Menu
[h=4]How To Reset Your SyncThru Password For A Printer With No Display Menu[/h] If the SyncThru Web Service login ID and/or password needs to be reset on a printer without a LCD display menu, the printer network settings need to be cleared to do so.
To clear the network settings:
Connect the printer to the PC via USB cable
Open Easy Printer Manager. Click the Easy Printer Manager icon (http://support-us.samsung.com/cyber/namo/namo_fileview.jsp?type=nfs&pid=decisiontree&did=545801&
[email protected]&sep=%7C) in the task tray on the bottom right of the desktop.Note: If Easy Printer Manager is not installed, click here to open the web-based installer and select the software.
http://support-us.samsung.com/cyber/namo/namo_fileview.jsp?type=nfs&pid=decisiontree&did=545801&
[email protected]&sep=%7C
Switch Easy Printer Manager to Advanced mode by clicking the Advanced mode button.http://support-us.samsung.com/cyber/namo/namo_fileview.jsp?type=nfs&pid=decisiontree&did=545801&
[email protected]&sep=%7C
Select your USB connected printer, and click Device Settings.http://support-us.samsung.com/cyber/namo/namo_fileview.jsp?type=nfs&pid=decisiontree&did=545801&
[email protected]&sep=%7C
Click the Network tab and scroll down to the bottom of the window.http://support-us.samsung.com/cyber/namo/namo_fileview.jsp?type=nfs&pid=decisiontree&did=545801&
[email protected]&sep=%7C
Click the Clear button.Important: This will clear all network settings, not just the Syncthru Web Service ID/Password. The printer will need to be reconnected to the network after clearing the network settings.
http://support-us.samsung.com/cyber/namo/namo_fileview.jsp?type=nfs&pid=decisiontree&did=545801&
[email protected]&sep=%7C
Click OK to confirm the settings should be cleared.
Power off the printer, then power it back on after a minute.
All network settings (including the SWS password) will be reset. If you had manually configured the IP information or were connected to a wireless network, you will need to re-enter those settings now. The login information will default back to "admin" as the ID and the password will be "sec00000".