How do I find the URL for my calendar?
This FAQ will show you how to find the CalDAV URL for your 123 Reg Mailbox Calendar.
The CalDAV URL is the location of your calendar's server. This is what a mail client looks for when you want to sync your calendar, however, some clients, such as Mozilla Thunderbird, need you to enter it directly.
Log in to your 123 Reg Mailbox using the webmail service.
From the list of available calendars on the left hand side of the screen, click on the Options button to open the menu. From the menu, click on the Properties option.
From the Properties panel, you will see you CalDAV URL.