What is the use of ost file in MS Outlook?

Know About Outlook OST & PST File

MS Outlook is email application which is globally used by email client's for personal or business email communication. MS Outlook is an application which does operated by Exchange Server therefore your email data is stores on Exchange Server as well as your local system. As you know that in Outlook your emails stores in Personal Storage Folder (.pst). An OST file is offline folder file of MS Outlook which is also created by MS Exchange Server during the synchronization between Outlook and Server. It also stores copy of Outlook emails, after crash of Exchange Server you can open Outlook emails in offline mode using OST file. In MS Outlook fix size depends of versions of MS Outlook, storage capacity is different in various editions of MS Outlook. Sometimes, Outlook email client have face problem due to oversized OST file.

OST File Location in PC

An OST files are created by MS Exchange Server which is stores in your system based on Windows platforms.

Use of OST File

 

An offline storage folder file (.ost) is most useful data for Outlook user's who face problem in access of emails in Outlook on the offline mode. Generally, it is enable in MS Outlook. It is created by MS Exchange Server on the cached mode and stores in local machine. Outlook emails client can open own whole emails data on offline mode in Outlook with use of OST file. If in case your MS Exchange Server becomes crash, in such condition, it play most efficient role in recovery of emails and you can easily open your Outlook data in offline mode.