mail & calendar integration via third-party services

[Lan0s]

Possibility to connect third-party mail and calendar services, other than Google and Microsoft. For example, integrating Proton with Twenty. I know it's not a priority, but I'd be delighted to work with you to find the best way to integrate it.

Alternative services are often chosen for their enhanced security, which can complicate integration with tools like Twenty. However, we could consider integration via calendar link sharing. For instance, could we imagine allowing event editing directly from a shared link ?

[gonzaleztroyano]

Also, it will be great if we could have CalDAV sync/integration, as is the open standard for server calendar management.
Thanks!!