An external system tries to register a session in POA using the following link
403 - ERROR:javax.servlet.ServletException: Can't login
Login and password are known to be valid.
Customers attached to brands can login using their branded URL only. This is default behavior, but can be changed for enabling some special integration with external systems which do not operate with POA brands.
To enable login from different brands, one should add the following string:
and restart POA UI on the POA UI host: