initialUrl property
Copied from ConnectToken.InitialUrl — the absolute URL the browser loaded, so an app can see the host it was reached on (a custom customer domain) and not just the path. A strict superset of InitialPath: same SDK-internal ikon-* query params stripped, everything else kept, so InitialUrl.PathAndQuery reproduces InitialPath. Empty for every non-browser client, so read it as an addition to InitialPath rather than a replacement. Client-controlled like InitialPath — treat it as a hint and re-authorize server-side; it must never gate anything security-relevant on its own.
Implementation
String initialUrl;