Cisco’s new version of Expressway brings some new features which especially support your video infrastructure in regards of interoperability based on former Acano Edge features.

• Edge Traversal of Microsoft SIP Traffic for Cisco Meeting Server Supported
• Meeting Server Web Proxy NOT yet SUPPORTED
• IM and Presence Service Federation With Skype for Business or Office 365 Organizations Preview
• Cisco Expressway as H.323 Gatekeeper Supported
• REST API Expansion Supported
• Allow Jabber for iPhone and iPad to Use Safari for SSO Over MRA Supported
• Shared Line / Multiple Line Support for MRA Endpoints Preview
• Smart Call Home Preview
• Secure Install Wizard Supported
• DiffServ Code Point Marking Supported
• Maintenance Mode For MRA Supported
• X8.9 Changes and Enhancements Supported

The Cisco Expressway 8.9 release notes are here: http://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/release_note/Cisco-Expressway-Release-Note-X8-9.pdf and the Expressway 8.9 admin guide is there: http://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/admin_guide/Cisco-Expressway-Administrator-Guide-X8-9.pdf.