Why Is My OST File Not Opening In Outlook?

Import OST in Outlook

This post explains the correct process for OST files not opening in Outlook to fix these errors. We have described the best technique to fix this error. Here we also recommend a reliable OST converter to help users to recover OST files and convert them to PST format. Read this post till the finish to get the complete information.

OST is an offline Outlook data file that contains a duplicate copy of the mailbox data on a local drive. OST files allow users to work in offline mode, e.g. For example, you can compose, delete, and edit when you’re not connected to the internet, and they’ll be automatically resynchronized the next time you connect to the Exchange server. But sometimes the user encounters problems and the message pops up: Outlook OST file cannot be opened in Outlook.

Reason For OST File Not Opening In Outlook

  • When OST files increase in size from their capacity.
  • Due to a storage failure.
  • When the OST file gets corrupted.

How To Fix This Error: OST File Not Opening In Outlook?

While it’s not gratifying, it’s true that there is no official solution. So, we recommend you go for Corbett OST to PST Converter. It is an excellent choice to convert OST files of any size in a single step without encountering any errors. This software is specially designed with advanced coding to get an accurate output without experiencing even a single information leak.

  • Download the tool, open it on your Windows computer, and then open it.
  • Browse OST files and enter them into the software interface.
  • From the list of export options, click PST.
  • Finally, browse the result necessary location and then click “Save” to get the output immediately.

Other Benefits Of Using Professional Software

  • The mailbox data structure has been preserved exactly as it was when it was originally entered. In addition, the PST File Converter offers comprehensive protection to prevent any impact on the original data.
  • It also offers a filtering feature to convert dates by date range, subject, recipient, and recipient and is also useful for skipping spam files.
  • This application is very easy to carry out without strong technical knowledge.
  • It allows the recovery and conversion of orphaned, password-protected, and oversized OST files.
  • There is no need to install any additional application to perform this solution.

The Verge

In this description, we have shared the right solution for OST files not opening Outlook error due to missing Outlook updates, faulty add-ins, orphaned/corrupted OST files, storage drive issues, and many more. However, you can easily fix this problem by mentioning the solution in this post. In case your OST file becomes inaccessible, as mentioned in the last section, you can use professional software to extract data from the OST file. The software converts OST files to PST format, which can be easily imported into any Outlook account or profile.

Also Discussed: Secure and Hassle-Free IMAP Backup: The Best Tools for Email Backup


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