On 2017.05.11 09:54, [hidden email] wrote:
> If I tri to install the calendar on Thunderbird, I get the message 'cant install because the security certificate is not valid. Can anyone help please? My email is b.drake @ ntlworld.com
> Thank you, Barry Drake.
Recent versions of Thunderbird, eg ver 50, are released with Lightning
integrated. That means you don't have to install it separately.
On 8/9/2017 1:17 PM, STF wrote:
> d, eg ver 50, are released with Lightning integrated. That means you
> don't have to install it separately.
If you are using a version earlier than 50, you need to be sure you have
the version of Lightning that works with the version of Thunderbird that
you are using.