Just noticed B.K.'s suggestion - I created a brand new calendar using that approach - basically I made the URL https://DS\marca@... (when I look at properties now, it's been url encoded to https://DS%5Cmarca@...)
Now Thunderbird doesn't ask for my password on every startup and I also don't see the error that I posted above in the Error Console anymore.
So this might just be a matter of revising the documentation a little or adding some code that can automatically determine the AD domain (if that's even possible - I know very little about AD and other Windows backend stuff).
Just noticed B.K.'s suggestion - I created a brand new calendar using that approach - basically I made the URL https:/ /DS\marca@... (when I look at properties now, it's been url encoded to https:/ /DS%5Cmarca@...)
Now Thunderbird doesn't ask for my password on every startup and I also don't see the error that I posted above in the Error Console anymore.
So this might just be a matter of revising the documentation a little or adding some code that can automatically determine the AD domain (if that's even possible - I know very little about AD and other Windows backend stuff).
Thanks, B.K.!!!