Guide to Converting OST Files into PST files
There are only two ways in which the contents of an OST file can be accessed - one, the user should have access to the computer and the email account on the Exchange server used to create the OST files; two, there has to be a restore point in the computer that will allow restoration of contents. If the user does not have access to the machine that was used to create the offline storage files, OST files or if there is no longer a restore point, the user will have to take the help of third-party tools such as Advanced Exchange Recovery from DataNumen to convert ost to pst.
A user could also use the Archive feature to move or copy mailbox items, to a PST file - if there are many mail items or if one would like to move almost everything in a mailbox, this is the best method to use. Unfortunately, this method does not allow one to archive the contacts list. It is easy to archive various other items. One only needs to set the AutoArchive option from the Tools menu. The archive can be reused by going to the File menu and then selecting Archive.
Simply exporting the items is another alternative though typically Export is not recommended as the best way of converting ost to pst. On the other hand, it is certainly a very easy way of quickly moving all the content from the OST files into a PST file. Even calendar items and contact lists can be moved through an Export.
Third-party tools such as Advanced Exchange Recovery mentioned above have a definite advantage over all the above methods since it can scan and restore data from not just orphaned OST files but also from heavily corrupted files. Thus, keeping Advanced Exchange Recovery handy will not only protect the data in case the OST files get corrupted but will enable users to move their data without fear of losing them in orphaned OST files.