Amazing to see that they successfully migrated. This is a great example for the rest of Europe and the teams that worked on this will (hopefully) have plenty of work ahead of them in helping other European entities migrate away from US big tech!

Open-Xchange and Thunderbird

I'd love it if they'd take even a small percentage of what they safe in licensing to donate to the ecosystem, but even if they don't it's a good win for OSS

I hope this holds. There have been several such migrations in the past, and they didn't last. Seeing as it is just email and not the entire OS/software landscape, it will probably hold.

Moving away from MS Exchange is a massive undertaking, I don't think a lot will realise just how hard that is.

The article doesn't touch on whether they've also dumped AD and if they haven't how they're doing AD<>OX (Though at its core, AD is just an EEE'd LDAP)

Test their email by sending them one!