Migrating a massive number of Outlook PST files into Office 365 is no small feat, particularly when you're talking about tens of thousands of emails, multiple mailboxes and large attachments. If you're looking to upload/import 50,000+ PST emails into Microsoft 365 then selecting the right migration method is key to making the process as simple and straightforward as possible.
Microsoft provide the Network Upload method via the Microsoft Purview portal. You upload your PST files to Azure Storage and then import them into Exchange Online mailboxes using an import mapping CSV file. The downside of course is that it can take a very long time to get your multiple PST files ready, organise your mailbox data and get the folder structure correct.
Simplify Large PST Migration with BreviSoft PST Converter Tool
The BreviSoft PST Converter tool is for users and IT pros who need to convert, export or migrate their Outlook PST mailbox data to other email platforms (such as Microsoft 365 and Office 365).
Rather than manually processing individual PST files, you can process multiple PST files and get the mailbox data ready for migration. That can be very useful in the context of a large scale migration (e.g. 50k plus emails).
Here are some useful features:
1. Bulk PST file processing: Add multiple PST files to process rather than processing each mailbox individually.
2. Office 365 Migration: Export or migrate your PST mailbox data to your Microsoft 365 and Office 365 accounts.
3. Preserve Email Properties: Ensure the subject, sender, recipient, date, any attachments and all other relevant email metadata is preserved.
4. Maintain the folder structure: Keep the mailbox folders and subfolders in place during the conversion.
5. Support for large PST files: Able to process large Outlook PST files containing thousands of emails and attachments.
6. Multiple Email Formats: You can export your PST data into a number of formats including EML, MSG, MBOX, PDF, HTML, CSV and others.
7. Selective Migration: You can choose which mailbox folders or email data you want to migrate rather than migrating everything.
Using BreviSoft with the Network Upload Method
If your organisation prefer the Microsoft Network Upload approach then you can use the BreviSoft PST Converter Tool to prepare and organise your PST mailbox data prior to uploading it.
A typical workflow looks like this:
- Step 1: Add the required Outlook PST files to the BreviSoft PST Converter Tool.
- Step 2: Preview the contents of your mailbox and select the emails or folders you require.
- Step 3: Select the appropriate export or migration option depending on your requirements.
- Step 4: Prepare the PST files for the Microsoft Network Upload process.
- Step 5: Upload the PST files to Azure Storage using Microsoft's supported workflow.
- Step 6: Create the CSV mapping file as required and then initiate the Microsoft 365 import job via the Purview portal.
Final Thoughts
For the organisation that's migrating 50,000+ Outlook emails, proper preparation and mailbox organisation is absolutely key. Microsoft's Network Upload will do the actual Azure upload and the Microsoft 365 import, BreviSoft PST Converter Tool can assist with the PST processing, conversion and mailbox prep.
It's a very viable option when you're looking at bulk PST data and planning a migration to Office 365 in a structured way.