The Microsoft Exchange Data Conferencing service could not bind to port 1503. This may be the result of some other T.120 program using the port. The T.120 protocol will not function properly until the port can be bound.

Details
Product:	Exchange
Event ID:	8207
Source:	MSExchangeT120
Version:	6.0
Component:	Conferencing Service
Symbolic Name:	MSG_STARTUP_BIND
Message:	The Microsoft Exchange Data Conferencing service could not bind to port 1503. This may be the result of some other T.120 program using the port. The T.120 protocol will not function properly until the port can be bound.

User Action
Wait until the port is free or restart the server.