XADM: Store Does Not Grow When Moving Users to Another Server

• Microsoft Exchange Server, versions 4.0, 5.0, 5.5

SUMMARY

When users are moved from one server in a site to another server in the same site, multiple copies of the same message are not moved to the destination server.

MORE INFORMATION

Exchange Server stores mail by a method that is known as single instance storage. If a message is sent to one recipient and is copied to 20 other recipients, Exchange Server only maintains one copy of the message in its database. It then has pointers, which point to the original recipient as well as to the 20 other recipients. If the original recipient and the 20 other recipients are moved to another server in the site with the Move Mailbox utility located on Tools menu of the Exchange Administrator program, only one copy of the message is maintained on the new server.

During a move of users, Exchange Server checks every incoming message against its own internally assigned IDs. These internal IDs are not viewable with a client. If Exchange Server determines the incoming message is a duplicate, it merely sets up a pointer for that existing message pointing to the newly moved user.

Keywords : XADM
Version : WinNT: 4.0, 5.0, 5.5
Platform : winnt
Issue type : kbinfo