Forms Authentication across Sub-Domains on local IIS

Question

I know a cookie can be shared across multiple subdomains using the setting

Answer 1

This is a reminder for anyone running in Framework 4.5 and trying to share the token with frameworks 4 and lower, please notice that this will cause you not to receive the auth cookie on any of the 4 and lower apps. ie: if in your web.config you have:

You can get it to work by removing the targetFramework="4.5" attribute to get it to work, though I don't know if there are any side effects in doing so: