You haven't defined the "ON vCom.[GUID]" anywhere. So if you were going to use the Inv_AeX_AC_TCPIP table, then just join it to the Inv_AeX_AC_Identification that you have defined as ID: LEFT OUTER JOIN Inv_Aex_AC_TCPIP ip ON ID._ResourceGuid = ip.[_ResourceGuid]
SELECT
vi.Name,I.Name AS 'Location',vct.Name AS 'Computer Type',va.[Serial Number]
,va.Model,va.Manufacturer,va.Status,vi.IsManaged,ip.[IP Address]
FROM
vResourceItem vi INNER JOIN ResourceAssociation ra ON ra.ParentResourceGuid = vi.Guid
LEFT OUTER JOIN vAsset va ON va._ResourceGuid = vi.Guid
LEFT OUTER JOIN ResourceAssociation loc ON (loc.ChildResourceGuid = vi.Guid OR
loc.ParentResourceGuid = vi.Guid) AND loc.ResourceAssociationTypeGuid = '05DE450F-39EA-4AAE-8C5F-77817889C27C'
LEFT OUTER JOIN vItem I ON loc.ChildResourceGuid = I.Guid
LEFT OUTER JOIN vComputerType vct ON vct._ResourceGuid = ra.ChildResourceGuid
LEFT OUTER JOIN Inv_AeX_AC_Identification ID ON ID._ResourceGuid = va._ResourceGuid
LEFT OUTER JOIN Inv_Aex_AC_TCPIP ip ON id._ResourceGuid = ip.[_ResourceGuid]
WHERE vct.Name LIKE '%Server%'
ORDER BY vi.Name