You can recover anytime your OST file items with SoftMails OST to PST Converter software is the easiest and fastest to use. Open the Outlook Data File OST in Outlook 2010 and convert all of the data in the Exchange OST file Mailbox without any problems. The software only aspires for user happiness if the user is satisfied with all of the software's features. All other file extensions are easily identified by the software. User can convert OST to PST All users of the software are given a free trial version.
Know More - Open OST to PST Outlook
Export mailbox as a PST file
Login to Outlook with the Exchange account that was used to create the OST files. And to export the OST mailboxes to PST, follow the simple procedure:
Go to Files >Open & Export and click Import & Export.
Select Export to a file; then click Next
Select the second option—Outlook Data File (.pst)—and click Next
Select the folder which you want to export and click Next.
Browse the location where you want to save the new PST file and choose the options regarding the duplicate items.
Method 2: Use ‘Archiving’ to save OST emails to PST
By enabling the Auto Archive method in Outlook, you will be able to save the items of the OST file in a separate PST file. This method helps you to keep the size of your mailbox manageable. When the size of the mailbox grows and there are multiple messages that are older and you do not require them to be in the mailbox, then you can put them in the archive folder easily. Follow the simple steps to enable auto archiving in Outlook.
Launch the Outlook application, go to File, and click Options.
Go to Advanced and click Auto Archive Settings.
Now select the number of days in which you want to run auto archiving. Select the folder to save the archived file; also, provide the archiving options and finally click OK.
With this, mailbox items from your OST file will be saved to the PST file as per your archiving settings.