I have a CNC machine whose controller runs on Windows 95 (I know that's old) that was connected to our company domain, which has a domain controller running Server 2008. About a year ago, there was a network hiccup that kicked out the original network login for the machine, and the machine could only connect to the network using my boss's (the IT manager's) login credentials. Even our regular domain administrator credentials wouldn't work, and that was with the dsclient9x program installed to allow the computer to connect to the network. The machine was set to a static IP address per company policy.
Fast forward to two days ago. My boss changed his domain password to align it with his company Microsoft account. I don't know why but I suspect it was due to a recent renewal/update of our service agreement for Dynamics. Since that password change, the CNC machine can no longer be logged into, either with my boss's credentials or with the original user login set up when the machine was originally installed. While the machine isn't totally down, since instruction programs can still be loaded by floppy, there is a time waste factor involved since there isn't a sufficiently close computer with a floppy drive. I've tried releasing and renewing the static IP address (the gateway, subnet, and DNS addresses are correct for our network. It has also been noticed the machine doesn't show up in Active Directory, but its static IP address can be successfully pinged, and I can resolve the machine name when using the "arp -a" command through a command prompt. I've tried resetting the password for the original account (not my boss's), but I'm slightly limited into what passwords I can use by password complexity requirements and the fact that while the controller has a keypad, using the SHIFT key to get lower-case letters (it defaults to upper-case) and certain symbols is problematic. I will try again when the machine operator has a break between operations (which could mean an hour or more wait).
Any suggestions/thoughts would be greatly appreciated. Thanks in advance for any assistance.