Convert Ost To Pst When You Experience Error Cannot Open Your Default Email Folder

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Microsoft Outlook and Microsoft Exchange Server together offer an idyllic messaging environment for a corporate organization. Exchange Server stores the entire user mailboxes in a single database termed as EDB or Exchange Database. There is a separate profile or mailbox created for each user which can be accessed with MS Outlook email client. A copy or exact replica of user mailbox is saved on client system in the form of OST file.
While you work offline and try to access data from Exchange Server, your MS Outlook email account synchronizes with Exchange Server and OST file automatically which later gets converted into PST. However, in some of the cases, the OST file is not able to get converted to PST file due to some errors in PST file or while in synchronization. As a result of this, the stored data becomes inaccessible. In order to resolve these issues, you need to manually convert OST to PST with the help of third party ost to pst conversion software.
In a practical working scenario, when you try to start Microsoft Outlook and try to synchronize the offline work done with MS Exchange Server, you might come ...
... across the following error message:
Cannot open your default email folders. The file *.ost is not an offline folder file.
Here *.ost is the extension of your OST or Offline Storage file, which is created by Microsoft Outlook while it was configured to work with Exchange Server. The file is created perfectly. This abrupt behavior might make your valuable email communication inaccessible and so you might have to go for an OST repair tool to resolve this issue. There might be two possible reasons behind the occurrence of this issue:
1.Your OST file has gone corrupt and Microsoft Outlook is unable to recognize this file and therefore MS Outlook reports this error.
2.OST file related with the particular Exchange Server mailbox cannot be access with MS Outlook. The error occurs generally while synchronization.
Under these situations, user needs to take appropriate action as per the reason of the problem. If the problem is due to corruption to the OST file, go for OST to PST conversion tools as these tools are devised to repair OST and later convert them to pst to restore the data from them. Also, if in case the OST file cannot be synchronized and converted with PST, then converting OST to PST is one resolution.
The only potential resolution of repairing your OST file appropriately is with the use of third party ost repair application. This software can effectively convert all the OST file objects into PST and make the data accessible. After converting ost to pst, the particular PST file can directly imported into MS Outlook and can be used to access data from Exchange Server.

http://www.osttopst.net/
http://www.nucleusdatarecovery.org/