I migrated my forum from somedomain.xyz/forum to a dedicated domain: www.somedomain-forum.xyz.
The database as well as the webroot remained the same, just the domain changed.
I changed the cookie domain to ".somedomain-forum.xyz" in library/config.php.
I changed the xf_option "boardUrl" to http://www.somedomain-forum.xyz via the database.
The problem now is that I cannot login via front- and backend (/admin.php) as the root user.
If I use the same credentials at somedomain.xyz/forum/admin.php the login is possible.
However I don't get an error during the login process, I just don't get a session just as if the forum sends a cookie for the wrong domain.
Is there anything else I need to change?
Thanks for your advice!