Want to upload OST to Exchange online? Download OST to Outlook web access tool. With help of this tool users can smartly Upload OST to Exchange online with maintain the original format of the attachments as it is. It is very easy for users to find the attach files. The software also provides the preview option to upload OST to Exchange online. Users can convert as many files as they want. There is no limitation on how many OST files you have, you can upload them all into Exchange Online format. The software also take care of the Email Header Items. All type of formatting are maintain accurately by the OST to O365 Conversion software. The trial version of the software is also available.