Step 1: Download, Install, and Run FixVare MBOX to Office 365 Migrator.
Step 2: Select single or multiple MBOX file(s) one by one or folder having MBOX files.
Step 3: Select MBOX to Office 365 export option.
Step 4: Connect software to Office 365 account.
Click on the "Authenticate User" button to connect software to Office 365 account.
Step 5: Import MBOX to Office 365 account.
Click on the "Upload Now" button to upload MBOX to the Office 365 account.
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