We only (officially) support Ubuntu LTS releases (e.g. 12.04 and 14.04). We also don't have plans on supporting the non-LTS versions right now. We do have plans to start providing Git snapshot builds, and in that context having support for latest operating systems would make sense.
The package in our Ubuntu Xenial (16.04) repository
does work on Ubuntu 16.10,
but it will have to be forcibly installed (e.g. "dpkg --force-all -i <package>") because the "initscripts" package which the Xenial package depends on is no longer present in Ubuntu 16.10.
Alternatively you can just build OpenVPN from sources:
$ sudo apt-get remove openvpn
$ sudo apt-get build-dep openvpn
$ wget https://swupdate.openvpn.org/community/releases/openvpn-2.4.0.tar.gz
$ tar -zxf openvpn-2.4.0.tar.gz
$ cd openvpn-2.4.0
$ ./configure
$ make
$ sudo make install
