A system and methods are provided for communication between entities that need to coordinate on scheduling events. Communication between schedulers, such as coaches, athletic administrators or organization administrators who may be in charge of a multiplicity of sports or activities at institutions, such as colleges or universities, who need to connect and communicate on a particular task. These tasks may include scheduling of events such as sports competitions or other events or activities in which there may be shared or common interests or a shared network of users, players or participants. Search by criteria to find matching potential opponents for scheduling events is also provided. Automatic schedule updates are maintained, typically in a logically centralized database, facilitated by a messaging system to facilitate ease of scheduling.