Problem with Dinamic custom group

Problem with Dinamic custom group

I have 2 Dinamic custom group.

1º With computers with S.O = Windows xp
2  With computers with S.O = Windows 7

all computers belong to the same Active Directory.


when I want to make a distribution on these dinamic custom groups

1º 

shows less than computers listing.
2º in dinamic group Windows 7 shows computers with another operating system ( like Windows Xp )


As an emergency solution, I'm exporting the list and put this list as distributing computers but I'm curious to know the reason for failure

Thanks for all







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