When is the End of Life for ALM/QC v11.5?

HI, I am having an issue where only a few users are having issues authenticating to the LDAP server. Some can't authenticate at all, and others are not able to authenticate every time, just every so often and we are unable to figure out any pattern to this. Any ideas would be very helpful and much a...

Is it true that the only v11.5 ALM Edition is currently available (10/1/2012)? If so, when should we expect the Enterprise Edition?