Exchange integration not working anymore

[Mr.Gosh]

After Upgrading to 15.10 the Exchange EWS integration allways regrets to communicate with the server.
"Unknown Error" is popping up in the top.

The Same Account is working on the same server in 14.04 and in 15.04

also an
gconftool-2 --recursive-unset /apps/evolution

or an
apt-get purge evolution evolution-ews
apt-get isntall evolution evolution-ews

does not help

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: evolution-ews 3.16.3-1
ProcVersionSignature: Ubuntu 4.2.0-11.13-generic 4.2.1
Uname: Linux 4.2.0-11-generic x86_64
ApportVersion: 2.19-0ubuntu1
Architecture: amd64
CurrentDesktop: GNOME
Date: Tue Sep 29 13:11:49 2015
InstallationDate: Installed on 2015-04-25 (156 days ago)
InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution-ews
UpgradeStatus: Upgraded to wily on 2015-09-24 (4 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alexey Arutyunov (ar-lex)]

The bug persists in Xenial. There's an infinite query after pressing "Fetch URL" during account addition. EWS_DEBUG=1 and CAMEL_DEBUG=all don't display anything informative. The gnome-keyring-daemon works without issues.

[Alexey Arutyunov (ar-lex)]

Can't test in Wily, but the issue seems to be fixed in Xenial with update to version 3.18.4.