Nextcloud contacts gives you CardDav, so it works with Android, iOS, and any number of Linux/Windows/Mac clients. Thunderbird certainly, and many other desktop mail clients. (Don't know about a Linux or Windows app limited to just contact management over CardDav, but it's probably out there.)
Giblet2708
joined 1 month ago
This book is amazing. Every other resource I find refers back to Michael Bazzell as the expert.
If you use Office 365 web version of Word and Excel, you can use that in a Linux browser; no Windows needed.
Look up Unicode Fraktur characters
That is not generally true across the board, but it may be true for your university because they have disallowed it.
Outlook, or rather Exchange Server and Office 365, does work with standard email clients like Thunderbird via the IMAP protocol, but it can be disallowed by the admins.