Migrating Outlook data sounds simple until you start looking at what is actually stored inside a PST file. It may contain years of emails, attachments, contacts, calendars, tasks, notes, and custom folders. Moving all of that while keeping the original organization can require more planning than expected.

I have been researching different migration options and came across the SysInfo PST File Converter. It supports PST and OST files and offers multiple export formats, including EML, MBOX, MSG, PDF, CSV, HTML, JSON, DOCX, VCF, and ICS.

One feature I would consider essential is folder hierarchy preservation. If an employee has hundreds of folders organized by customers, projects, or departments, losing that structure during migration would make the resulting mailbox difficult to use.

The PST Converter Tool also allows users to select specific folders and filter emails according to a date range. This can be useful when an organization only wants to migrate selected historical data rather than an entire archive.

Another consideration is attachments. Business emails often contain documents that are more valuable than the message itself. Having options to retain attachments, save them separately, or skip them gives users more control over the final output.

For larger migrations, batch processing could reduce repetitive work when multiple PST files are involved. Duplicate detection can also help when several archives contain overlapping messages.

Previewing the mailbox before conversion is another practical feature. It allows users to inspect the source data and decide what actually needs to be moved.

I would recommend testing any migration with a copy of the original data first. Check several emails, attachments, folders, and other mailbox items before running the complete conversion.

Has anyone here recently migrated PST files to Microsoft 365, Google Workspace, or another email platform? What was the biggest challenge you faced during the migration?