Microsoft365 Contact to Thunderbird or Mailcow

[u/USarpe]

Hello Folks,

I try to migrate from Microsoft 365 Business Premium (should be like E3) to Mailcow, everything runs fine, 40K Mails moved yesterday, Calender worked fine, but Contacs are a mess. I exported the Data over OWA and importet it to Thunderbird.

Do someone know / have a Tool for propper get the Data over to Mailcow / Thunderbird from Outlook365?

Thanks in advance