MS Exchange Server and MS Outlook altogether provide a smooth and efficient communication platform for the professionals and individuals within the organization. The MS Exchange server creates a unique user profile for every user which is accessible on MS Outlook and for each and every account; an OST file is automatically created which the user can retrieve even when the online connection is not set up or in an offline mode.  Immediately after the connection is set up, the OST is synchronized with the server and is turned into PST file.

But under certain adverse situations such as OST file has turned inaccessible or not getting synchronized after establishing the connection, exchange server crash, etc. the personal data of the user profile’s mailbox also get stuck in that inaccessible OST file. Consider a real-life scenario where a user wants to gain access to some personal stuff stored in the OST file but due to security reasons he is not allowed to access the exchange server. On trying to access that OST file, the user encounters the error message:

Unable to open your default e-mail folder
The file C:/Documents and Settings/User Name/Local Settings Application
DataMicrosoftOutlookoutlook.ost cannot be accessed. You must connect to your MS Exchange
Server at least once before you can use your offline folder file.

For accessing the OST file in MS Outlook 2007, the following steps can be taken:

1. In Outlook 2007, Click Tools -> Account Settings -> Double-click Email account -> More settings-> Advanced tab -> select Use Cached Exchange Mode check box -> Click Offline Folder File Settings and Click Browse -> Browse to .OST file -> restart Outlook.
Offline Folder File Settings
2. Click File and click Import & Export.
Import & Export
3. Click Export to a file option and press Next.
Click Export to a file
4. Select Personal Folder File (.pst)
Select Personal Folder File (.pst)
In the worst scenario, if these steps does not makes the OST items accessible then the efficient solution that the user is left with is, converting the OST file in to PST. However, migrating the OST file data items into PST which is accessible in MS Outlook helps retrieve the data efficaciously and using the same platform i.e. MS Outlook.

For migrating the data items from OST mailbox to PST mailbox, an effective and easy way is to make use of a commercial OST to PST migration utility. OST Recovery utility is crackerjack amongst the other utilities available in the market today. It is advanced and expedient software that performs proficient migration of OST mailbox data items such as emails, attachments, contacts, folders, posts, journals, meeting requests, notes, etc. It facilitates the user to recover even the password protected files without any complexity. Moreover, the user can recover the email properties such as CC, BCC, To, FROM, DATE, etc. as well. The latest version of the software is compatible with MS Exchange 2013/2010,2007/2003/2000/5.5/5.0 and MS Outlook 2013/2010/2007/2003/2002/2000/98/97 versions.

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There is an effective professional software called OST to PST Converter to migrate the OST file content from to PST. It can check the information present in the OST file and convert it into a safe PST file. The software can convert unlimited emails, notes, contacts, attachments, deleted items, etc. The software supports each version of Outlook, ranging from the latest 2019 to the oldest 2002.