We have a problem getting ActiveSync to work in our configuration of SOGo. 
Whenever a user tries to connect with their Android phone, they get a 
connection error. Trying to examine the ActiveSync server through 
https://testconnectivity.microsoft.com gives the error 
http://pastebin.com/jjNsurew. This is a multi-domain configuration, so we use 
UPN ([email protected]) to connect.

SOGo works properly otherwise together with vimbadmin, dovecot and postfix. The 
sources for SOGo and SOPE were downloaded through Github. ActiveSync was 
compiled and installed, using wbxml.h from the libwbxml Github (since it's not 
included with sogo).

We're fairly certain it's some sort of proxying error, though we can't for the 
life of us figure out what it might be. We've been stuck in this position for 
about two days now. Mysql's error.log, which states 'error reading 
communication packets', is particularly confusing. According to the internet, 
this is because the queries sent are too large. We've increased the maximum 
allowed packet size considerably (see mysqld.conf), but this does not solve 
anything. The log files included are all excerpts from a connection attempt of 
the Android phone.

OS: Ubuntu LTS 16.04 Xenial

Relevant logs:
http://pastebin.com/MyhgrdrS - /var/log/apache2/error.log
http://pastebin.com/6Ynjukyd - /var/log/apache2/access.log
http://pastebin.com/GAChZ0mE - /var/log/sogo/sogo.log
http://pastebin.com/myEK37YM - /var/log/mysql/error.log
http://pastebin.com/UbWXHFxt - /var/log/mysql/mysql.log

Relevant configs:
http://pastebin.com/dGVetRe2- /etc/default/sogo
http://pastebin.com/vyDnGgX2 - /etc/sogo/sogo.conf
http://pastebin.com/zCYbXPMn - /etc/apache2/apache2.conf
http://pastebin.com/MtBAr1pV - /etc/apache2/conf-enabled/SOGo.conf
http://pastebin.com/3BK3dXp0 - /etc/apache2/sites-enabled/ssl.conf
http://pastebin.com/MW3diRD8 - /etc/mysql/mysql.conf.d/mysqld.conf 

(If this shows up twice, that's my bad. This is a plaintext e-mail, while the 
first one I sent contained some html tags)
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