User Log out when changing Store Url

When i am logged in  one store , lets say store A with url www.A.com and i am trying to navigate to Store B with Url www.B.com , the user automatically logs out and i need to logged in again .

Is there a way to stay  logged on in every store i navigate?

Please see this work item. It contains some details about how SSO (single sign on) can be implemented

In the comments area it sais that SSO  will be implemented in version 3.50 .

Is that correct or I have to build my own authentication mechanism ?

If you edit the web.config file and add

    <forms name="NOPCOMMERCE.AUTH" loginUrl="~/login" protection="All" timeout="43200" path="/" requireSSL="false" slidingExpiration="true"  domain=".YourDOMAIN.com" enableCrossAppRedirects="true" cookieless="UseCookies" />

It actually works............

nvlotom wrote:
No. It's stated that "it's NOT planned to be done in the upcoming version 3.50"