If you can have Outlook save the individual .eml files instead of as a Pst, you can use this Add-on to then import them into Thunderbird: https://addons.thunderbird.net/en-GB/thunderbird/addon/importexporttools-ng/?src=search
This Mozilla Support questions goes into a little more detail - and also has a link to a third party provider that the OP found useful: https://support.mozilla.org/en-US/questions/1154588
=> More informations about this toot | View the thread | More toots from thunderbird@mastodon.online
text/geminiThis content has been proxied by September (ba2dc).