OST (Outlook Offline Storage Table) is a file format utilized by Microsoft Outlook to create an offline copy of an email account’s contents, including emails, calendars, contacts, tasks, and other data items. In this article, we will delve into the intricacies of the OST file format, its functionality, advantages, limitations, and more.
OST files are generated when you configure an Outlook account with Microsoft Exchange, Office 365, or Outlook.com. The file acts as a mirror of the data stored on the server, allowing you to access your information even when offline. Changes made while offline are synchronized when the connection is reestablished.
When you set up an email account in Outlook, the application downloads data from the server and stores it in an OST file if the account is configured to use Cached Exchange Mode. You can read, delete, and send emails, which get updated on the server the next time you go online.
You can manage OST files from within Outlook under Account Settings. Options include changing the location of the OST file, controlling the amount of data to be cached, and more.
OST files are often converted to PST (Personal Storage Table) for more flexibility and portability. Numerous software solutions, both free and paid, can assist with this conversion.
OST files can contain sensitive information, so it’s crucial to implement security measures such as encryption and periodic scans for corruption.
The OST file format is an integral part of Microsoft Outlook’s functionality, offering offline access and improved performance. However, its benefits come with limitations like profile dependency and susceptibility to corruption. Understanding the OST format can help users and administrators make the most out of its advantages while mitigating risks.