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.