[xenial] Evolution Calendar constantly asks for password from TFA Google Account

[cement_head]

Evolution just began asking (prompting) for password from a TFA Google Calendar account. This is constant. TFA bypass is arranged for Evolution, but Evolution won't accept the password. Either TLS handshake has changed or Google's TFA bypass has changed for Calendar(s).

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: evolution 3.18.5.2-0ubuntu3.2
ProcVersionSignature: Ubuntu 4.15.0-33.36~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-33-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Aug 23 11:57:50 2018
InstallationDate: Installed on 2018-03-24 (151 days ago)
InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution
UpgradeStatus: No upgrade log present (probably fresh install)

[Andre Klapper (a9016009)]

https://bugzilla.gnome.org/show_bug.cgi?id=795997 is fixed in evolution-data-server 3.28.3.
If your distribution does not ship 3.28.3 or higher you need to ask your distribution for backporting the fix.

[Jeremy Bícha (jbicha)]

Andre, Ubuntu 16.04 LTS included evolution-dats-server 3.18. 3.20 introduced a major overhaul of Google oauth2 integration. So a fix in 3.28.3 is probably not going to be easy to apply to 16.04 LTS.

cement_head, I encourage you to upgrade to Ubuntu 18.04 LTS which has many improvements in Evolution.