There aren't sufficient details to diagnose your problems, but an
endpoint
in this context is a tcp port.
A few things to consider.
In a typical BCM 2 installation, BCM creates its own SQL instance,
without the default
UDP port mapping utility turned on. Normally when SQL starts up it
picks a TCP port.
Typical SQL apps query the port mapping utility via UDP, and it returns
the TCP port
being used by the SQL instance. BCM uses a fixed TCP port, 56183, and
all its
clients (Outlook/BCM) use that port. If you install a BCM database on
another SQL
instance, you need to make that instance use TCP port 56183 if the BCM
clients are
to connect successfully.
In addition, any firewall on the machine with the instance must allow
traffic on port
56183 through, or clients will fail to connect.
The BCM v3 beta is using SQL Xpress, instead of MSDE. Xpress is
essentially the new version
of MSDE. This new Xpress instance is using tcp port 5356.