I have a Outlook 2016 OST files and wants to convert it into Outlook 2019 PST format. How can I migrate all my Outlook 2016 files into latest version of Outlook 2019 PST.
Please suggest.
Unfortunately Microsoft do not provide an official conversion tool. There are many 3rd-party OST to PST tools but are not freeware, and the trials have limitations.
If transferring the files are not crucial, you just view when you want with this free and open-source OST / PST Viewer.
This is not a converter: Dijji/XstReader
It is usually not necessary to convert from OST to PST.
OST files are just reflecting what is online. Just connect your Outlook 2019 to the same online service, whether it be Gmail or whatever, and everything will be set up just fine.