The pre-final release of 8.6.7 has been uploaded to the download server.
For an overview of changes, check out the changelog.
As @fbartels has mentioned before:
Please be aware that due to a build failure this release currently does not include packages for Ubuntu 14.04. Packages for 14.04 will be added once the build succeeds again.
In general we recommend users of Ubuntu 14.04 to switch to a newer Ubuntu release, since 8.6 will be the last Kopano release to include packages for this distribution and with packages for Ubuntu 16.04 and 18.04 appropriate alternatives exist.
Please reply below if you find any issue(s) with this version.