I've 3 websites on 3 different servers. All the websites have a form login before you can enter. Most of the websites have the same users, but they have to login every time the user switch from a website. So now i am building a new website with one master login, when the user is logged in, i've the login credentials from the other sites.
Now i am searching for a why to log them in. I was thinking of posting to the login page of the other websites. But thats not possible now, i get a server 500 error or just a redirect to a login page without the credentials.
Is it possible to allow posts from another domain? The 3 websites use IIS 8.5.
Thanks!