OST files or the Offline Folder Files are considered as the copy files of the server based folders of the Exchange Mailbox. Have you ever wondered what shall happen to the mailbox if it gets erased from it? However now, the users need not worry, as you can have access to these files with the help of PST conversion. If you have not modified the Original Microsoft Exchange profile, then it is evident that you still have the opportunity to access the Microsoft Exchange client or MS Outlook at times when you are offline. You can access MS Outlook with your previous OST files and all this is possible only with the help of PST Conversion software. By this software you can easily recover and convert your data and avoid any delay which might else wise hamper your work.

However it might happen that you have erased the mailbox or have downloaded the new version with, resultant the entire data of the OST files gets lost, damaged or corrupted. In the broad scenario, intentionally or unintentionally if you have done so, and have modified or created a new advanced mailbox, then the data which is stored in the OST files will become inaccessible forever. It is here that conversion OST to PST software comes into action. OST files are devised with a strict security, due to which Windows NT verification cannot be used to work when you are not online. Hence to have access to the OST files, you are required to confirm that you have the authority to log onto the Exchange server Mailbox ahead you get access to the OST files. To do this, the exchange Server produces an encrypted cookie from the mailbox's exceptional entry ID and this makes it possible for you to successfully log onto the Exchange server desktop.

This cookie which is so generated is saved in the Exchange Server profile and this profile stores this key for OST. Related to this fact, the OST will verify the presence of the key every time when you attempt to access the OST files. When you modify, alter your MS Exchange profile or in case you attempt to link the new advanced mailbox or try and work on the existing profile; however on the new network, this MS Exchange replaces this key. This key will be released with an advanced value from the new or upgraded mailbox which you have created. And all this will lead to inaccessibility of the OST data which was generated with the earlier mailbox. But if you download OST PST convertor software after you have recognized that you have lost the most important data because of the modification of the mailbox, you can have access to these deleted an corrupted OST files.