import larger pst into Office 365

I have a small business customer with 5 users. 2 if the users have pst files which are easily managed and I have simply imported them into their Exchange Online via Outlook.

The 3 remaining users have fairly large pst files (2GB +)

I was thinking of putting the 3 pst files onto an external hard drive and bringing them back to my office where I have a much better upload bandwidth on my internet conection.

Are there any tools or methods that you would recommend I use in this case. I have read that there is an import feature in Office 365 Admin centre but I cant see anything myself.
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Vasil Michev (MVP)Commented:
You can certainly use the new Import feature, but I feel it might be an overkill for just 3 pst files. Here's the documentation just in case:

Just use some spare machine and upload them via Outlook, it might take a while but it's easy to do.

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Austin RobCommented:
The above suggested reference "Office 365 Import service" looks good to get this job done.

Moreover, checkout this article which will explores the new PST Capture Tool from Microsoft. In this part, he demonstrates how to search and import PST files.
Hello, I have successfully used Migrationwiz from BitTitan for mailboxes as large as 18G. There is a cost but I have found the tool really user friendly and the support very responsive.
roy_battyDirectorAuthor Commented:
Great advice thanks
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