Have you updated the Authentication settings for the Web Site? It
sounds like you need to add the second domain to the list of available
ones.
Regards.
Go to webinterface
Check Explicit Authentication
Add the domains to the domain list and put it to "Display Domain Field"
and put the dropdown-box to Enforcement.
Kind Regards
Fly
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To write an email remove "keinspam" out of the emailaddress