[Inf-IT DAVcl] does infcloud support header "Access-Control-Allow-Origin <a-domain>"?

Hi everyone, Does infcloud support header "Access-Control-Allow-Origin <a-domain>"? I tried to configure my caldav server with "Access-Control-Allow-Origin" header set to <a-domain>", but infcloud seems to be unable to connect the caldav server, reporting the following error in the browser's console:

"Error: [netCheckAndCreateConfiguration: 'PROPFIND https://<a-domain>/dav/'] code: '0' status: 'error' - see https://www.inf-it.com/infcloud/readme.txt (cross-domain setup)" webdav_protocol.js:120:4

When I set this "Access-Control-Allow-Origin" header to "*", it works. I find it more secure to be able to set this header. Can you tell me how is infcloud supposed to work with this header? Thank!