How come my CalDAV synchronization failed with error: “Not Found”?
This is a system error usually encountered when you try to synchronize your calendar with an uninitialized calendar server, such as Google Calendar.
This means when you try to synchronize eM Client with a newly created Gmail account, the calendar folder will not be created because the account’s Google Calendar has not yet been initialized.
To solve this issue, simply log into your Google account from a web browser and access your Google Calendar at least once. Next time you synchronize your gmail account, the account’s calendar will show up in eM Client.
If you see this error on other calendar servers, the solution is the same, just initialize the calendar by accessing it once before synchronization.