Security Groups and Mail Non-Universal Groups in Exchange 2007

All my security groups I created in AD (W2K3) that I mail-enabled in Exchange 2007 is showing up as "Mail Non-Universal Group". Exchange 2007 will not allow me to change or modify the group as a Mail Non-Universal Group.

As for the security groups, they are global groups which I have them that way since I only have one domain and it is not needed to replicate to all GCs. So the only two options I have here is change my security groups to universal or create a new distribution list.

Does anyone have a better way to do this or do I have to change my security groups to universal from global group?
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katredrumAsked:
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SubsunCommented:
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katredrumAuthor Commented:
Is it best practice to put GG into UG even for a distribution list? I am using GG Security Groups as Distribution list as well.
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SubsunCommented:
It is relevant only in multi domain environment. You can use GG > UG > DL and use DL group to assign permissions..
Click here for best practice details..
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katredrumAuthor Commented:
thx! good info!
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