What is an OST file?
Developed by Microsoft, its Outlook software, an email client and personal information manager use the OST extension. These files can store a plethora of different kinds of data types, but most commonly contain a copy of mailbox information of the user’s Microsoft Exchange, Outlook, or Office 365 accounts. It can also store tasks calendar data, contacts, emails, and other information offline on the user’s device.
How to Open OST Files
How to Make OST Files
Below are some software programs that can open OST files. Download one to open your file now.