Comment 3 for bug 1733591

Tested from ppa [1] and working partially.
Need to extend it for:

[2348775.582564] audit: type=1400 audit(1511280310.792:2314): apparmor="DENIED" operation="mkdir" namespace="root//lxd-bionic-i386_<var-lib-lxd>" profile="/usr/sbin/kopano-server" name="/var/lib/kopano/attachments/" pid=8987 comm="kopano-server" requested_mask="c" denied_mask="c" fsuid=0 ouid=0

[1]: https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/3048