Personal Archive:
In Microsoft Exchange Server 2010, personal archives provide users an
alternative storage location in which to store historical messaging data. A personal
archive is an additional mailbox (called an archive mailbox) enabled for a
mailbox user. Outlook 2010, Outlook 2007, and Outlook Web App users have
seamless access to their archive mailbox. By using either of these client
applications, users can view an archive mailbox and move or copy messages
between their primary mailbox and the archive. Personal archives present a
consistent view of messaging data to users, and eliminate the user overhead
required to manage .pst files.
In Exchange 2010 Service Pack 1 (SP1), you can provision a user's
personal archive on the same mailbox database as the user's primary mailbox,
another mailbox database on the same Mailbox server, or a mailbox database on
another Mailbox server in either the same or another Active Directory site.
This provides flexibility to use tiered storage architecture and to store
archive mailboxes on a different storage subsystem, such as near-line storage.
In cross-premises Exchange 2010 deployments, you can also provision a
cloud-based archive for mailboxes located on your on-premises Mailbox servers.
Online Archive:
Microsoft Exchange Online Archiving is a cloud-based, enterprise-class
archiving solution for your Exchange Server 2010 Service Pack 1 (SP1) or later
on-premises organization. With Exchange Online Archiving, your organization can
host your users’ primary mailboxes on your on-premises servers and store their
historical e-mail data in cloud-based archive mailboxes. This solution can
assist your organization with archiving, compliance, regulatory, and e-discovery
challenges, while simplifying your on-premises infrastructure. EOA provides you
the following advantages:
Help meet long-term retention
requirements Cloud-based archives allow you to store large quantities of
messaging data off-site in secure and controlled datacenters. Exchange Online
Archiving helps your organization meet regulatory compliance or business
requirements for long-term retention of e-mail. Using archive policies,
messages are moved from on-premises mailboxes to the cloud-based archives. The
same retention policies applied to on-premises mailboxes can be enforced on
cloud-based archives.
Help meet eDiscovery and
litigation hold requirements With cloud-based archives for your on-premises
mailbox users, you can perform seamless discovery searches across both the
on-premises primary mailbox and the cloud-based archive. When users are placed
on litigation hold in your on-premises organization, their cloud-based archive
is also placed on hold.
Lower storage costs Moving
historical e-mail data to a cloud-based archive allows you to reduce your
organization’s storage requirements. You can provision users’ primary mailboxes
with appropriate mailbox quotas, which keeps mailbox sizes in control and your
storage costs low.
Provide Anywhere Access
Cloud-based archive mailboxes are similar to an on-premises archive mailbox.
Using Outlook 2010, Outlook 2007 or Outlook Web App, users are able to access
older messages and content in the archive transparently, without requiring any
additional configuration on their computers.
Note: Outlook users can
access an archive mailbox in online mode. Archive mailboxes aren’t cached to
the user's computer when using Outlook in Cached Exchange Mode
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