Issue with embebbed Chrome

I've a http connection using chrome.

I've assigned (using user specific settings) a credential in the way domain\user

In the connection to site, I run autodiscover.

If if use embebbed chrome, the login name is injected in domainuser (without backslash) mode. If I defined the browser as external, the credentials are injected correctly, that is domain\user

If I use IE, it works both in embebbed or external.