Creating GALs to assign to ABPs - GALs are blank

I'm running Exchange 2010 SP2 UR5v2 on a single server with two different companies using it for mail.  I do not want them to see each others Address Lists.   The Global Address list displays everyone, so I went to set up a Address Book Policy that would restrict what they are able to see.   The Address Book Policy requires a "Global Address Book" on top of an Address List, OAB, and Room List.   No problem until i get to the GAL creation.   It must be done with the PowerShell, so I create these two individual lists and no matter what I use to create them, the GAL is blank.   Here are some examples of the code I've tried so far:

New-GlobalAddressList -Name "CompanyA Global Address List" -RecipientFilter {((CustomAttribute1 -eq 'CompanyA') -and (Alias -ne $null))}

or 

New-GlobalAddressList -Name "CompanyA Global Address List" -RecipientFilter {(RecipientType -eq 'UserMailbox')}

No matter what I do - even if I try to not filter by anything, I the GAL is blank.   I'm testing this from OWA.   Any ideas?   It's 3am, been at this for 4 hours now with no luck