I present to you a tool which helps me in converting Outlook OST files to PST with recovery of attachments, contacts, calendars, etc.

• Support converting or encrypted OST file to PST file
• Allows to search & save individual emails to OST files
• Save converted emails to MSG, EML, RTF, HTML or PDF formats

The company STELLAR offers a multitude of solutions that you can consult by following the link: https://www.stellarinfo.com/ , moreover I had used EDB to PST Converter to recover data from an exchange 2013 on premise following a crash, I can tell you that it saved me sleepless nights.

The difference between PST and OST

The basic difference between PST files and OST files is their tangibility.

It means that PST files contain the actual data of all emails in your Outlook mailbox. Whereas, OST files contain cached files to use in cached storage for your emails. The OST file on your computer memory is just the local copy or the cached copy of your Outlook data. The master copy of Outlook data is stored in the Outlook server, and a local copy of the cached data is created in your computer’s memory, called an OST file.

If you are using previous versions of Outlook such as Outlook 2010 or Outlook 2007 on your computer, cached content for your IMAP account is created in the pst file. However, Outlook has changed this in later versions of the application. Your IMAP accounts are now created and cached in ost files.

Some files and folders in the ost file are not synchronized with the Outlook mail server and reside entirely on your computer. This kind of folder is marked as ‘This computer only’. This indicates that these files are totally in your computer’s memory and have no chance to synchronize with the server. You need to be very careful while creating any backup file to ensure data safety.

Use case

Sends OSTs to Office 365

Unfortunately there are still many companies using the POP3 or IMAP protocol, the tool helps to simplify data conversion. “You will need to download the technician version available here https://www.stellarinfo.com/email-tools/ost-converter.php ”

Hardware failure

In the event of a workstation failure, you can recover emails locally with a simple conversion to PST

Abnormal Outlook shutdown

In the event of an abnormal shutdown of Outlook, it is generally sufficient to remake the profile of the users’ mails, but in the case of a mailbox with a large volume, or a reduced internet speed, it is easier to use the tool.

Mail recording

The tool allows you to save emails to other MSG, EML, RTF, HTML or PDF formats

Split or compress PST file

Following the cases it is useful to compress or to estimate a large pst file in several, I remember a customer who had a 100 GB mailbox with a 300 GB archive box he had taken an Office 365 E5 license , “Unfortunately if the archive exceeds 100 GB it is impossible to load it” unless you open a problem ticket with Microsoft so that they create another bank for you and export to PST do not exceed 20 GB each.

STELLAR – OST to PST Converter

• Launch the application, the main user interface appears as shown below: