This feature is available in all editions.
I installed an instance of VersionOne on my own server. Now I don't have a Logout link.
How to Fix It
You probably selected Windows Integrated as your authentication mode. When VersionOne is installed locally and Windows Integrated Authentication is selected, VersionOne doesn't authenticate users. Instead, IIS authenticates each user against the Active Directory and passes the user through to VersionOne.
Since it is not possible to "logout" under Windows Integrated Authentication, the VersionOne web application has no "logout" link (VersionOne has no control over the authenticated user passed over by IIS).
To change your authentication mode, simply re-run the installer as an upgrade and select a different authentication mode.