Limit the number of user in a query-based distribution groups.

Discussion in 'Active Directory' started by josé, Aug 25, 2009.

  1. josé

    josé Guest


    Is it possible to limit the number of user in a query-based distribution
    groups ?
    For performance puropses, we want to use query-based distribution groups,
    and we want to limit the query to 200 users to our GC.

    Is this possible ?

    josé, Aug 25, 2009
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  2. Howdie!

    I don't think that you can limit the number of users in such a group.
    How would that benefit you? I mean - if the query is setup to hit 1000
    users and you get like random 200 - haven't you missed the goal then?

    Seriuosly - have you tested how far the GC(s) will be hit by
    implementing this? 200 users sounds like the near end of the performance
    range a GC can handle over and over.

    Florian Frommherz [MVP], Aug 25, 2009
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  3. josé

    josé Guest

    Hello, :)

    Understood !

    Last question: do QDBG can affect GC ?

    I was thinking about admins that could create QBDG that queries thousand
    users and that could affect my GC.

    Thx for your help

    josé, Aug 26, 2009
  4. Query-based distribution groups are _only_ executed at a GC as far as I
    know. As soon as Exchange would notice that a mail recipient is a query
    based distribution group, it would shoot the corresponding LDAP query to
    a Global Catalog to expand it to recipients. So QBDCs affect a GCs
    performance - you need to measure how much. I doubt this will be a big
    deal unless you have multiple QBDCs with thousands of users each.

    Florian Frommherz [MVP], Aug 26, 2009
  5. josé

    josé Guest

    ok, i will test performance on one of my GC with QBDG.

    thank you for your support.

    josé, Aug 26, 2009
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