evolution fails to load mapi plugin

As stated, evolution just starts up and asks for entering new accounts, instead of loading previously configured ones (Exchange account set via Gnome-Control-Center and online-accounts).

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: evolution-mapi 3.18.0-4~wily1 [origin: LP-PPA-gnome3-team-gnome3-staging]
ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
Uname: Linux 4.2.0-35-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: GNOME
Date: Tue Apr 19 13:41:46 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-03-31 (18 days ago)
InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Release amd64 (20151021)
JournalErrors:
 No journal files were found.
 -- No entries --
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution-mapi
UpgradeStatus: No upgrade log present (probably fresh install)