Topic Last Modified: 2005-11-17

The Microsoft® Exchange Server Analyzer Tool queries the Active Directory® directory service to determine the number of domains in the environment. If the Exchange Server Analyzer finds multiple discrete Active Directory domains in the forest, each domain is then queried to determine whether there are one or more mail-enabled, non-universal groups in those domains.

If the Exchange Server Analyzer determines that mail enabled non-universal groups exist in the multiple-domain forest, the Exchange Server Analyzer displays a warning.

If you use domain local or global distribution groups in a multiple-domain forest, e-mail delivery problems may occur for the following reason:

To resolve this issue and make sure of e-mail delivery, use universal distribution groups in a multiple-domain environment. The membership of universal distribution groups is replicated to each global catalog server in each domain

For more information about this issue in particular and about universal distribution groups in general, see the following topics:

In addition, see the following Microsoft Knowledge Base articles: