Open OST file in OWA with the use of OST to OWA Migration Tool on Windows 11, 10, 8.1, 8, 7, XP or any below edition. You can open bulk OST files in OWA account in a single process by using the OST to OWA Migration Tool. All professional and non-professional users can use this OST to OWA Program and successfully open OST file in OWA account. To know how to use it before getting its licensed edition, you can first use its Free Demo Edition, which is applicable to import first 25 items from OST file in OWA without cost. To open bulk OST files in OWA at once, you need to purchase its licensed edition.