Page History

...

However, if dialogs or User Properties are used and are deemed important and the domains do not match, extra steps are required to make use that the application will function properly.

Option 1: Altering the Security level in Internet Explorer on every client machine
By default the privacy level setting of Internet Explorer is set to Medium. This setting can be found under Tools > Internet Options > Privacy tab.

When the level is set to Medium, third party cookies without a Compact Priviledges Policy will be blocked. By altering the privacy level to the lowest level "Accept All Cookies" the third party Cookies will get accepted. Although this works, it means that in order to be able to use the Solution properly the setting needs to be altered in the browser of all users. It can be that corporate IT departments restrict the user from altering this setting.

Third party Cookies: these are Cookies from a different domain as the domain from the main page displayed in the browser.
Cookies without Compact Privicy Policy: These are Cookies from pages that do not include a so-called P3P header in the HTTP Response

Option 2: Adding a "Compact Privacy Policy" to the Web Client

...