Hi, To convert OST to PST in Outlook, here is official link for your reference: Know how to change OST to PST and Add OST to Outlook. By the way, this is Exchange forum, your questions is more related to the Outlook client.

• How To Convert Outlook Ost To Pst
• Convert Outlook 2016 Ost To Pst

How To Convert Outlook Ost To Pst

Convert Outlook 2016 Ost To Pst

Open OST file in vMail OST Converter software. Choose to save the file type as PST and the destination folder in the Convert option. Click on Convert Now to save all Outlook mailboxes data as a PST file. The size of the converted PST file may be considerably smaller than the size of the original OST file. The converted PST file will be saved in Unicode format as a *.PST file that is used as the default file format in Microsoft Outlook 2007 or later. DataInfoTools OST to PST Converter is an easy-to-use email converter that helps you access emails, contacts, drafts, attachments, etc. Of your inaccessible OST file. With this tool, you can perform a smooth conversion of OST file to a PST file.