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Why archiving in Exchnage 2010?

Probably a stupid question but I am seeking right/plain answer.
Why we need archiving, whats the benefit activating that feature on mailboxes? Is there any disadvantage or risk to use it? Important points to maintain.
Note: Please do not give me technet links as they have tens sublinks :)
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teomcam
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teomcam
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AkhaterCommented:
the benefits ? well since you are looking for a "discussion" I will try to give you what you want

1. Keep the "active" database size small, you can put the archive data on a separate database that will be locate on "cheap" disk. e.g. if you have an iSCSI SAN and a fiber channel one, the archive can be on the iSCSI while the active mailbox on the Fiber Channel
2. another benefit of 1 is backup window, the time needed to backup the database is much less since it is smaller and the archive can be backup less frequently since it is an archive
3. Keep the "Active" mailbox of the user small. first benefit is you will have smaller OST on the computers since the archives are not cached. another advantage is faster sync first time user configure the accocunt
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teomcamAuthor Commented:
Thanks very much :) Do I need to create another database? I have only 100 users and per user have 3 GB data used on their mailboxes. At the user side, will they notice anything? Do they have to take additional steps to access their archived mails? Is there any risk to have feature?
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AkhaterCommented:
Do I need to create another database?  > no you don't have to but it is one of the options you have if you want to benefit from points 1 and 2.

of course at the user side the emails will be "moved" from the mailbox to the archive, archives are only available online through OWA and outlook 2010 (some edition don't remember which).

Risk ? no i can't think of any risk other than the pissed CEO needs an email of 3 years ago while on a plane and find he doesnt' have access to it :)
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