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CHAPTER 4

Distribution Group-based Queries

Unacceptable Fields for LDAP Query

Assistant Comment Direct reports Division E-mail Address (other) Employee ID Generalization Suffix Home Address Home drive Home folder ILS Settings International ISDN# International ISDN# (others) Logon Workstations Member of Middle name Teletex# Teletex# (other) Title

 

Expansion Servers

Mail that is sent to a mail-enabled group cannot be directly delivered to the members of that group - the message must be expanded. Expansion of mail occurs by default on the first Exchange server that handles the message; however, this might not be a desirable option if the server is already taxed or otherwise low on resources.

The Expansion servers role can be give to an Exchange server that has no mailboxes - a Public Folder or Bridgehead server for example.

By doing so, you alleviate the loading on other Exchange server and your users do not experience a slowdown in mailbox access due to the expansion of a large mail-enabled group.

The drawback is that the expansion server becomes a single point of failure (SPOF). If the expansion server is unavailable, the message is not expanded and no members of the group will receive messages.  Conversely, if an Exchange server fails, some members will still get messages.

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