AZUpload.ps1
This .ps1 will assist with bulk importing local PST data directly into Office365 mailboxes (or in-line archives)
It works by bulk uploading PST files into a free ingestion folder provided by Microsoft.
Then a CSV file instructs Office365 as to which PST files go into which mailbox (or mailbox archive).
Basically, this guide is based on this guide from Microsoft: PST Import
Microsoft Guide see also SymmetrixTech guide
However, using this script you can avoid all the command line stuff
To see the full documentation click here