Migrating emails, contacts, and calendars from an Outlook PST file to Office 365 can seem daunting, but it doesn't have to be! This thread explores various techniques to ensure a smooth and efficient import process.

Before you begin:

   
• Permissions: Ensure you have the "Mailbox Import Export" role in Exchange Online.
• PST File Preparation: Close any open PST files and confirm there's no password protection.
• Target Mailbox: Identify the specific Office 365 mailbox where you want to import data.
• Here are your import options:

1. Individual User Import via Outlook:Pros: Simple and familiar interface for smaller PST files.

   
• Cons: Limited to 2GB per file, time-consuming for large datasets.
• Steps:Open Outlook and go to File > Open & Export > Import/Export.
• Choose Import from another program or file > Outlook Data File (.pst).
• Select the PST file, choose import options, and click Finish.
  

2. Network Upload and Microsoft 365 Import Service:

   
• Pros: Efficient for bulk imports and larger PST files.
• Cons: Requires administrative permissions and familiarity with the service.
• Steps:Upload PST files to Azure Storage using the provided SAS URL.
• Create a PST Import mapping file defining target mailboxes and data mapping.
• Use the Microsoft 365 Import Service to create and configure an import job.
• Start the import job and monitor its progress.

3. Third-Party Migration Tools:Pros: Offer advanced features like filtering, deduplication, and reporting.

   
• Cons: This may require additional costs and technical expertise.
• Examples: Shoviv PST to Office 365, SkyKick Migration Suite, CodeTwo Office 365 Migration, and Bittitan Migration Wizard.

Additional Tips:Estimate file size: Understand limitations and choose the appropriate method.

   
• Test import: Perform a trial run with a small PST file before migrating everything.
• Consider data filtering: Filter unwanted emails or duplicates during the import process.
• Monitor progress: Track the import job and address any errors promptly.
• Seek help: Microsoft resources and community forums offer valuable guidance.
  

Remember: Choose the method that best suits your technical skills, file size, and organizational needs. Don't hesitate to ask for help if you encounter any challenges!

There is an Official manual method to import PST file into Office 365 account but it is a very technical process. So I would like to suggest MailsDaddy PST to Office 365 migration software to open data in the cloud mailbox. This is a Gui solution to load and export data in an Office 365 account without any technical hassle.