Update or Remove stored proxy credentials

When initially setup Create Cloud for Teams apps on 5 systems in our organization our proxy would not allow open authentication to the adobe servers.   I was forced to enter my network credentials which were stored on each system.   Now, the systems are attempting to update the applications, each time attempting to use my stored credentials.   How can I update or remove the credentials from each system?    Each time the update attempts to execute, my network account receives a bad password, then locks the network account.   Any assistance would be greatly appreciated.    The systems are Windows 7 Professional, a mix of 32 bit and 64 bit systems.