My solution was that previous support personnel had disabled the 'real' domain Administrator account in lieu of the far more secure 'admin' account ;->
I enabled the default Adminstrator account, logged on and viola!
Solution was found in the following MS TechNet discussion:
> Yes, I have verified it is in the top
>level, and not under the My Business\Users.
>
>>"Dave Nickason [SBS MVP]" wrote:
>>
>>Just to clarify, in addition to verifying
>>the group membership of the Administrator
>>account, you verified that it's in that
>>Users AD container? I ran into this exact
>>error with an upgrade where the
>>Administrator account had been moved out
>>of the top-level Users container (not an
>>OU), and into the MyBusiness\Users OU.
>>
>>
>>>"dwhagerman" >>>wrote in message
>>>Let me just add.... the only reason I
>>>want/need to install the consoles is
>>>to install their additional licensing.
>>>If there is any other way to add the
>>>licensing without using the SBS Consoles,
>>>I'm all ears!
>>>
>>>
>>>>"dwhagerman" wrote:
>>>>Thanks for the quick reply.
>>>>No, it has not been renamed, and it is
>>>>also a member of all the correct groups.
>>>>
>>>>
>>>>>"Dave Nickason [SBS MVP]" wrote:
>>>>>Make sure the Administrator account has
>>>>>not been renamed, and that it's in
>>>>>the "Users" AD container. This is the
>>>>>top-level one at the bottom of the list
>>>>>in AD Users and Computers (not under
>>>>>MyBusiness or elsewhere).
>>>>>
>>>>>
>>>>>>"dwhagerman" wrote in message
>>>>>>Ok, here's the scenario.
>>>>>>Ran a clean SBS 2003 install and
>>>>>>stopped the SBS setup after the
>>>>>>initial install was done. Then ran
>>>>>>dcpromo to pull all the current AD
>>>>>>info/etc.
>>>>>>After everything was done, I was going
>>>>>>back through to finish the setup so
>>>>>>all the consoles/etc. would install,
>>>>>>and I'm getting this error when doing
>>>>>>the checklist.
>>>>>>"You must be logged in using the
>>>>>>built-in administrator account"
>>>>>>I've done the above scenario time
>>>>>>after time at multiple
>>>>>>locations, so I'm a little stumped
>>>>>>why this is happening on this
>>>>>>particular machine. I found 1
>>>>>>reference on KB regarding a Windows
>>>>>>2000 dcpromo, but nothing there
>>>>>>helped.
>>>>>>Any ideas?
>>>>>>
>>>>>
>>>>
>>
>