database/data records folder in Mac Outlook 2011 email too large

Hi - We have an email address using Office365, and the account is on a Mac using Mac Outlook 2011, and the database is approximately 85 gb, and the data records folder is over 30 gb. Is there anything I can do to shrink these? Getting low on disk space, and think that 115 gb for an email account is a little excessive. :) - any help would be appreciated.
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Davis McCarnOwnerCommented:
First, empty the deleted items folder.  Then, if you care to, either search or sort the emails by size to delete old, very large, emails.  Afterwards, hold down the option key while starting Outlook which will launch the database utility so you can "rebuild" which is the equivalent of compacting and repairing in Windows.
You may; however, need enough space for a backup copy so that could present a problem.  How large is his hard disk drive?

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