If not, remember that if you are running an Exchange E-mail server or running the Exchanger server software on a Windows server such as Server2008 for example, domain requirements force your Client to run Win7 Pro--no other versions of Win7 retail software (Starter, Home Basic, Home Premium) will work on a domain server enivonment which is needed for all Exchange server clients. The fact that Outlook2007 is asking for a password when connecting to the Exchange Server and Outlook2010 is not, leads me to the conclusion that not all of your 10 Win7 PCs are domain-capable. This problem caught me offguard 10+ years ago with Server2003 and Outlook2000/2003. Took me weeks to figure it out!<<<BIGBEARJEDI>>>