In-Place Archives and other Exchange features
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This section explains the functionality between In-Place Archives and various Exchange features:
• Exchange Search The ability to quickly search messages becomes even more critical with archive mailboxes. For Exchange Search, there's no difference between the primary and archive mailbox. Content in both mailboxes is indexed. Because the archive mailbox isn't cached on a user's computer (even when using Outlook in Cached Exchange Mode), search results for the archive are always provided by Exchange Search. When searching the entire mailbox in Outlook 2010 and later and Outlook Web App, search results include the users' primary and archive mailbox.
• In-Place eDiscovery When a discovery manager performs an In-Place eDiscovery search, users' archive mailboxes are also searched. There's no option to exclude archive mailboxes when creating a discovery search from the Exchange Administration Center (EAC). When using the Exchange Management Shell to create a discovery search, you can exclude the archive by using the DoNotIncludeArchive switch. For details, see New-MailboxSearch. To learn more, see In-Place eDiscovery.