Do you want to reduce size of OST file in Outlook, so here I suggest getting eSoftTools OST to PST converter software. This tool converts OST files into multiple file formats such as OST to PST, EML, EMLX, Office 365, Yahoo Mail, Gmail, MSG, etc. It supports all versions of Windows OS. This tool has a demo version where users convert 25 items from each folder of OST for free. It has technical support and all users get help by email or live chat. This tool automatically detects corrupted files and converts them into PST.
