Support for Windows 10

According to this article CRM versions 2013 and 2015 will be supported when accessed from the Edge browser in Windows 10.

Version Update in which support is added for Windows 10
2013 Update Rollup 4 for SP1
2015 Update 0.2
On-line Update 1.1

Therefore, it seems that versions 2013 without SP1 and 2011 and earlier will not be supported.