Query to include primary user

Hi,

This query works fine, but when it runs I get NULL for the Primary User. Is it not possible to get the primary user for a retired asset? Is the primary user value in another table. It might appear that is the case, but with so many views and such one never knows.

Thanks.

 SELECT    COALESCE(os.[Name],ci.[Name]) [Computer Name]
        , ra.[CreatedDate] [Retired Date]   
        , pu.[User] [Primary User]
        , cs.[Model]
        , cs.[Manufacturer]
        , cs.[Identifying Number] [Serial Number]   
        , os.[OS Name]
        , os.[OS Revision]  
        , vi.[Name] [Location]
            
FROM [vRM_Computer] c
INNER JOIN [vRM_Computer_Item] ci
    ON c.[Guid] = ci.[Guid]
INNER JOIN ResourceAssociation ra
   ON ra.ParentResourceGuid = c.Guid AND ra.ResourceAssociationTypeGuid = '3028166F-C0D6-41D8-9CB7-F64852E0FD01'
   AND ra.ChildResourceGuid = '492C463B-AFA2-4DD6-AE73-6FD2C7B0E489'
LEFT OUTER JOIN ResourceAssociation loc
    ON loc.ParentResourceGuid = c.Guid AND loc.ResourceAssociationTypeGuid = '05DE450F-39EA-4AAE-8C5F-77817889C27C'
LEFT OUTER JOIN vItem vi
    ON loc.ChildResourceGuid = vi.Guid
LEFT OUTER JOIN vHWProcessor p
    ON c.Guid = p._ResourceGuid
LEFT OUTER JOIN vHWComputerSystem cs
    ON c.Guid = cs._ResourceGuid
LEFT JOIN Inv_AeX_AC_Primary_User pu
    ON pu._ResourceGuid = vi.Guid
LEFT JOIN [Inv_AeX_AC_Identification] os
    ON os.[_ResourceGuid] = ci.[Guid]

ORDER BY [Computer Name]