Our general recommendation is not to skip releases when upgrading server. However, we validated that you can seamlessly upgrade directly from server 4.3, 4.4, 4.5 and 4.6 to server 4.7. While future version skips may not be tested by CircleCI, this ensures a clear path to adopt server 4.7 and stay on a newly supported version.
For more information on Server release version 4.7 see the changelog.