[horde] CalDav with Thunderbird/Lightning/SogoConnector

[Michael Lehner]

Hey there,

I'm trying to use the new feature CalDav and CardDav of Horde 5.1 with 
Thunderbird/Lightning/SogoConnector.

Til now with no luck at all.

I use IMP as authentication method with my IMAP Server. The IMAP Server 
credentials need the "@"-sign, so that my login looks like this: 
michael at lehner-online.net

I can remember myself that I have already read that there are some known 
issues with my software-combination, the "@"-sign and Horde 5.1. But I 
can't find that thread anymore and maybe a possible solution for that 
problem.

When I use the provided URL of Horde in my browser I get this error 
message, which is a little bit confusing cause the user exists:

<d:error>
<s:exception>Sabre\DAV\Exception\NotFound</s:exception>
<s:message>User michael at lehner-online.net does not exist</s:message>
<s:sabredav-version>1.8.4</s:sabredav-version>
</d:error>

Thanks in advance for help.

Greets, Michael