I wonder if anybody could help with a security flaw there seems to be with
the ADC software for Exchange 2000 (not tested on 2003).

When you install the ADC software a global security group is created in
the local domain called Exchange Services, the account used in the ADC is
placed into this group.

The Exchange Services group has full admin rights over the entire Exchange
Org, you cannot see this via the delegate wizard but if you examine the
security at the top level of the Exchange Org or use ADSI you can see the
group (or groups if you have ADCs in multiple domains)  having full admin
rights.

If you run a larger size Exchange Org with multiple domains where
different departments/companys manage their own AGs/domains but say the
main routing and the various Exchange Org wide management are done
centrally there exists a flaw.....

A user can be placed into the Exchange Services group that exists in a sub
domain and they gain the elevated permisssion of Exchange Full Admin
rights to the entire Org. If you run multiple domains under different
management then they can place users into this group and bypass the
Exchange AG security.

Any ideas how to mitigate this risk ?

Thanks in advance,
Martin.

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