What’s new
According to Apple, OS X Server v5.1 improves the general stability of OS X Server and delivers the following specific improvements:
- Updated for OS X El Capitan v10.11.4
- Support for TLS 1.2
- General Profile Manager performance improvements
- Support for new Education features in iOS 9.3
More details on APPLE SUPPORT SITE
Apple security information of Server 5.1 Link
