Everyone involved in mediation must keep all information confidential not only during the process but also afterwards. This includes the parties, mediator and any representatives who may also attend. Discussions and any information provided are treated as confidential by the mediator. This includes agreements, the mediator may feedback to your company that an agreement has been reached but cannot provide any details of what the agreement was.
The only exceptions are cases when there is evidence that a law may have been broken, or that someone is in danger.