Where are the exchange 2010 personal on premise archive files stored?

I've enabled on premise archiving for a couple of mailboxes. I can see that the archive has been created and old email have been moved. Generally the archive files reside on the local computer as archive.pst. Where are they stored after enabling this feature? i'm sure it's obvious but i can't find it.
ronfastI.T. DirectorAsked:
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ronfastI.T. DirectorAuthor Commented:
I looked at the properties of one of the folders that was archived and found this location:
\\Online Archive - username@domain.com
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ronfastI.T. DirectorAuthor Commented:
Okay i went to OWA and found the archive there. So my my followup question is, and this may be a dumb question and i may not have the right terminology. Since it's still on OWA does the archive exist in our Mailboxes on our local exchange server? I want to reduce the size of the mailboxes in Exchange to gain some performance. I've been told that very large mailboxes has a hit on Exchange's performance.
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Gareth GudgerCommented:
I've been told that very large mailboxes has a hit on Exchange's performance.

It depends on what size of mailbox we are talking about here and the numbers of users. Most documents say Exchange 2010 was designed with 10GB mailboxes in mind. But then 2010 had a 90% I/O reduction in comparison to Exchange 2003. 2013 on the other hand was designed with 100GB mailboxes in mind. And that was only a 93% reduction in database I/O compared to 2003.

Where are they stored after enabling this feature? i'm sure it's obvious but i can't find it.

They are basically stored in a secondary mailbox on your server. The archive can also be configured to have its own quota limits. That archive mailbox can be in the same database as the primary mailbox, or, it could be in a database on much slower, cheaper hard drives. Studies report that 90% of mail over 6 months is never opened again. So, slower disks is a great possibility.

Generally the archive files reside on the local computer as archive.pst.

The In-Place Archive in Exchange, that you are implementing, was a direct response to eliminate the archive.pst file on local computers. However, you still need to run discovery tools to find out where in your network all those archive.psts exist so you can ingest those back into the online archive.
http://technet.microsoft.com/en-us/library/hh781036(v=exchg.141).aspx

Okay i went to OWA and found the archive there.

Yep. Another one of the benefits of using the In-Place Archive over traditional archive.pst files.
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ronfastI.T. DirectorAuthor Commented:
WOW. thank you for such a clear explanation. Our max mailboxes are around 3GB which in light of what you said isn't very big.
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Gareth GudgerCommented:
I'd say 3-5GB is about average for a mailbox. But yea, lots of studies out there to show how mailboxes and mail itself keep growing year over year. So, each new version of Exchange pushes that limit for database size and mailbox size.
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ronfastI.T. DirectorAuthor Commented:
Thanks again.
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