Is there a maximum size to the .pst file for Outlook?

I have a user here at the school that needs to be migrated from Thunderbird to Outlook (apparently Thunderbird isn't totally compatible with IMAP and his sent emails are taking 15-45mins to be populated in his "Sent Items" folder).  My question is, is there a maximum file size that the PST can reach?  Right now his Thunderbird profile is almost 75GB.  I know this is ridiculous but he says he "needs" all of these emails.
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Smith and AndersenConnect With a Mentor Commented:
what version of Outlook???
2010/13 has 50gb limit
Smith and AndersenConnect With a Mentor Commented:
this link to a reg hack to expand size
s3e3Connect With a Mentor Commented:
Well, I have to admin I've never see one that large! :)

This might help you:

50GB is limit for Outlook 2010 and 2013 but can be increased by following this note:

I would worry about such large PST's though, easy to get corrupted....
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