grawlinson [1] filed a deletion request for open-xchange [2]: The package has not been updated since 2016, and the majority of source files have been taken offline. Also applies to the other open-xchange packages, found here: https://aur.archlinux.org/packages/?O=0&K=open-xchange [1] https://aur.archlinux.org/account/grawlinson/ [2] https://aur.archlinux.org/pkgbase/open-xchange/