If you want to reduce OST file size, so Here I suggest you download SysInspire OST to PST converter software. This tool can convert an OST file into multiple file formats for conversion. It supports all versions of Windows OS. This tool has a demo version that can help users in conversion of 25 items from each folder. It has technical support and all users can get help by email or live chat. It supports all versions of Windows OS. This tool does not need to install MS Outlook in users' Pcs to open an OST file.
