OST (Offline Storage Table) files are replicas or mirror images of a user mailbox on the Exchange Server.
If your user mailbox is deleted from server, the OST file on your computer becomes orphaned. In this case, if the original MS Exchange profile is not deleted or altered then user can still work with the MS Outlook (MS Exchange client) offline data by recreating the OST file.
However, can recover your data present in the old OST file by moving the messages from OST to PST, if your profile that was using the old OST file is not deleted or altered. However, in case you made any changes in the profile that was used for creating OST file has been modified to a new mailbox, then there is a possibility of losing the data present in the OST file.
You can recover your previous email data from OST files manually by moving the data to a PST file. There is an option in MS Outlook to open an Outlook PST file, you can open your PST file and then, drag and drop your emails from the OST file to PST file respectively. This option allows you to move emails from OST to PST. However, there is no manual method to copy OST to PST file. You need to use any third party software for the same. OST Recovery software is one of the best tools, which can be used to copy OST email to PST.
If you are looking for a solution that will copy OST to PST file format easily and quickly, OST Recovery software is what you need. It allows you to recover your inaccessible OST file and export it into PST/EML/MSG format. By using this tool, you will be able to open converted OST file in Outlook, within a couple of clicks. OST Recovery software will automatically connect the converted files in Outlook, so you will not need to import PST files manually.
OST Recovery software is one of the best solutions for problems caused with Exchange Server OST files like accidental items deletion, inaccessibility of data due to server crash during synchronization, and similar more. In such cases, you can copy or convert your OST file to PST file format. All your contacts, email, calendar, etc., can be opened in Outlook after OST to PST conversion.