Winodws and FQDN

On Windows 2008 R2, If I perform the following from Powershell,  I get the following FQDN:

    PS C:\t> (gwmi WIN32_ComputerSystem).Name + "." + (gwmi WIN32_ComputerSystem).Domain
    field.DEPTA

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At this point I have added a role of ADDS, but I have not yet run the install (dcpromo.exe)

If I need to for any reason, how do I change the FQDN of the Windows machine?

Thanks
Anthony LuciaAsked:
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Brad GrouxSenior Manager (Wintel Engineering)Commented:
Until you create a forest with the first Domain Controller you won't have a FQDN, as FQDN stands for Fully Qualified Domain Name. You don't yet have a Forest or Domain, so you can't have a FQDN. Your FQDN will be servername.domain.com. To change it, you need to either change the server name, the domain it is a member of - or both.
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Anthony LuciaAuthor Commented:
Its current name is

field.DEPT

There is no .com at the end

What does this tell me
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