Hi, I recently installed a CalDAV server at my workplace to connect to in the Thunderbird calendar, as we all already use Thunderbird for e-mail. If I create a meeting in the calendar and invite everyone else, they all get an email invite with the name, time & place of meeting etc.. And at the top of the email, just below the title of the email, there is a purple bar with boxes saying "Accept", "Tentative", "Deny" and "More" (or something synonymous, I have it in Swedish). For one employee that purple bar with the "Accept"-box does not appear, and the only way for him to get the meeting to his calendar is by downloading the "invite.ics" file that is attached and importing it afterwards. I have added '''two screenshots''' showing what I mean. One with the Accept, Deny etc. and the one person's e-mail that doesn't have the boxes. We have checked his settings without finding anything that seems wrong in first glance. I have checked the caldav user account but the user account has the same settings as the others. Thunderbird is updated to the latest version (115.7.0, same as I use and it works for me). When he invites people to a meeting they all get the invite correctly, so nothing is wrong when he creates a meeting invitation, only when he recieves an invite. What could be wrong? Is there a setting he might've activated/deactivated in Thunderbird that we missed when looking or could there be something else we have thought of? Thanks, Tim