This post is quick summary of what you should know about Exchange 2013 Service Pack 1 and ORF compatibility.
Compatibility with SP1 Client Access or Mailbox Servers
- ORF 5.1 and ORF 5.2 are compatible with Exchange 2013 Service Pack 1. However, you need to install a hotfix from Microsoft KB2938053 to make ORF (and other third-party Transport Agents) able to work with SP1. Please see our Knowledge Base article regarding this issue and ORF deployment options.
Compatibility with the new Edge Transport of SP1
- Edge Transport was (re)introduced to Exchange 2013 with Service Pack 1. This is an entirely new server role, so neither ORF 5.1, nor ORF 5.2 supports it. We have started researching the new role and it will likely receive support in a dedicated release after ORF 5.2.