Limit one Mailbox Retention to 4 months in Exchange Admin o365?

Is it possible to minimise a mailbox in the exchange admin centre of Office 365 to only allow 4 months of mail to be downloaded to the client (Outlook 2010)? If we had Office 2016, then we could do this via the client but in Outlook 2010 its only possible if you set the filters up on all the folders. Anyway round this guys?

Would still need older mail so that will need to be still available either via the online portal to the mailbox or via other means?

Thanks
SycamoreIT
SycamoreITAsked:
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timgreen7077Exchange EngineerCommented:
no not in exchange or office 365. all mail will be available to the mailbox, but you can set outlook to only cache 4 months of emails but not in exchange or o364.
Vasil Michev (MVP)Commented:
That's a client-side feature. It's only possible via the filters functionality in Outlook 2010 as you noted above.

A server-side alternative would be to set up a retention policy that will archive messages after 4 months. Messages older than 4 months will then be only available in the Online archive (accessible via both Outlook and OWA, but not downloaded locally). Alternatively, you can configure a retention policy that deletes the messages instead and put the mailbox on hold, that way the messages will not be exposed to the end user, but recoverable by admins if needed. Read more here: https://technet.microsoft.com/en-us/library/dd297955(v=exchg.160).aspx

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Todd NelsonSystems EngineerCommented:
With any version of Outlook, there is no option to set to cache 4 months of mail.

With Outlook 2010, there is no way to "throttle" the cache.  It's either enabled or not.  It's either all or nothing.

With Outlook 2013 and 2016, you can set cache to 1 month, 3 months, 6 months, 12 months, 24 months, or all.

There is no way to set a specific cache for mailboxes in Exchange, aside from setting retention policies and archiving like Vasil suggests.

Personally, I would recommend upgrading any Office 2010 clients as it has not been supported with Office 365 since October 2015.  Office 2010 will work, but there are no guarantees.
timgreen7077Exchange EngineerCommented:
Provided enough info to the author's question.
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