The option "prefer client-side email scheduling" cannot be selected (checkbox greyed out).
I'm having problems when accepting invitations received by email. When pressing "Accept", the original organiser is replaced by the email I use to access my calendar (CalDav) and the answer probalby is sent to this email as well. I found a hint that I should check the option "prefer client-side email scheduling" in the calendar settings, but this option is not selectable (checkbox and description greyed out). I'm using Thunderbird 60.6.1 and Lightning Version 6.2.6.1.
Any idea?
Thanks, Peter
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What caldav server?
I find it is available for Gmail calendars, but not yahoo on my machine, so I guess some servers just don't support server side scheduling.
Thanks for your answer. I have asked my provider, but did not get a response yet. I'm now using an ICS calendar on an FTP server, this works.