OWA Users Mailbox Size Inceasing

Question

Hi Guyz,
Hope ur all doing good. I have a query regarding OWA, we have so many remote users who only uses OWA and cannot use outlook. Now their mailbox size are increasing, is there any way to archive their emails and still allowing them to access their archived
emails as well? Cannot use outlook and also dont have enough space to use Personal Archives option, please suggest any other solution or any tool 
Virgo

Answer 1

Well the main question is why you want to archive the data in the first place? If they're accessing the email via webmail then what ever you do the messages will have to remain in Exchange, since there's no way for those users to access email exported in
a .pst file. Obviously that means there's little point archiving if the aim is to reduce the overall amount of disk space used by Exchange. Additionally, I can't imagine their mailboxes are large enough that Exchange can't handle the size of them.
However, if you wanted to do something like reduce the amount of data being backed up, by spitting the old messages out of the mailbox store holding them, then I guess one option would be to export those messages into a separate "archive" mailbox for each
user. That way if you have multiple mail stores configured you could move those archive mailboxes to a different store, with perhaps a smaller backup frequency etc.
Since OWA does allow users to open additional mailboxes that they have permission to, so long as you granted the users full mailbox permissions to their corresponding archive mailbox, they could then access the old data from OWA still. You can export the
messages using New-MailboxExportRequest
http://technet.microsoft.com/en-us/library/ff607299(v=exchg.150).aspx and specify the period of time you want to archive. I can't see a method to directly archive from one mailbox to another, but you could use that to archive to .pst on the server, and
then use
New-MailboxImportRequest http://technet.microsoft.com/en-us/library/ff607310(v=exchg.150).aspx to import it into the archive mailbox.