Alex Serban

When you create a profile in Outlook using Exchange Server, IMAP, or Microsoft 365 account, an Offline Storage Table (OST) file is automatically created by Outlook on the local system. The offline storage file contains all your mailbox items such as emails, attachments, contacts, calendar, etc. The OST file is synchronized with the server mailbox at all times when the Outlook is connected to

It is not unusual for Outlook users to face issues or errors while using the application. Many Outlook users, on different tech/community forums, have reported facing an issue where their Outlook application stops responding or freezes while accessing it, sending an email, or opening a file. This is a grave issue as it might prevent users from sending emails or even accessing the mailbox