Addendum: There is still a thunderbird-exchangecalendar-beta package on AUR, carrying the latest tagged release of this project from 2019. So there is really no loss to delete this alpha package. On 6 August 2022 14:37:30 GMT+02:00, notify@aur.archlinux.org wrote:

MarsSeed [1] filed a deletion request for thunderbird- exchangecalendar-alpha [2]:

This Thunderbird module has not been developed since 2018. It was compatible with Thunderbird v52-59, and this AUR package carries the last experimental alpha for Thunderbird v60.

Meanwhile, current Arch repo version of Thunderbird is v91.12.0, and v102 has recently been released.

So I recommend deleting this long-discontinued addon package which does not work with current Thunderbird versions.

[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/thunderbird-exchangecalendar-alpha/