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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 &quot;Sent Items&quot; folder). &nbsp;My question is, is there a maximum file size that the PST can reach? &nbsp;Right now his Thunderbird profile is almost 75GB. &nbsp;I know this is ridiculous but he says he &quot;needs&quot; all of these emails.
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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.

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

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

Outlook

Thunderbird is an email, newsgroup, news feed, and chat (XMPP, IRC, Twitter) client that supports POP and IMAP and LDAP address completion. The vanilla version is not a personal information manager, although the Mozilla Lightning extension adds PIM functionality. Thunderbird can manage multiple email, newsgroup, and news feed accounts and supports multiple identities within accounts. Features such as quick search, saved search folders, advanced message filtering, message grouping, and labels help manage and find messages. Thunderbird incorporates a Bayesian spam filter, a whitelist based on the included address book, and can also understand classifications by server-based filters such as SpamAssassin. Extensions allow the addition of features.