I understand that you’re looking for ways to export Outlook PST files to Exchange Online. There are generally two approaches available: the manual method and a third-party migration solution. Both methods can work effectively, depending on your requirements.
If you are specifically searching for software to upload PST files to Office 365, it’s important to first evaluate your needs before choosing a tool. Since many migration tools are available in the market, each offering different features and capabilities, selecting the right one depends on factors such as ease of use, migration speed, data integrity, batch migration support, and compatibility.
Based on my knowledge, one option you can consider is the GoldyTools PST to Office 365 Migration Tool. It is designed to help users migrate PST files to Office 365/Exchange Online efficiently. However, I would still recommend comparing features, pricing, and user reviews of multiple tools before making a final decision.