OX6:OXtender for Business Mobility Installation Guide

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Open-Xchange Connector for Business Mobility

Components

With the Connector for Business Mobility, Open-Xchange also introduces the Universal Synchronization Module (USM). This module provides a framework for synchronization protocols such as Microsoft Exchange ActiveSync (EAS) or other services building on this foundation. USM acts as a layer between the Open-Xchange HTTP API and the synchronization protocol. It handles synchronization specific tasks like conflict management. The synchronization stack (USM) and protocol implementation (EAS) are shipped as OSGi bundles and run as a plug-in of an Open-Xchange instance.

Component Overview

USM, EAS and OX work together as components. This is a general outline about how these components interact.

When the device initiates a synchronization through ActiveSync, it contacts the webserver using the URL /Microsoft-Server-ActiveSync via HTTP/s. This URL is forwarded to the Open-Xchange application server where the corresponding servlet is offered by the EAS component. The EAS component then uses USM to initiate a connection to the OX HTTP API and exchanges groupware data. In all cases, USM works as an client to the Open-Xchange HTTP API. It also uses some database tables which are accessed through the Open-Xchange SQL interface to store metadata like synchronization status. The same component stack is used to transport groupware data back to the device.

Requirements

Since the Connector for Business Mobility is a server plug-in based on the OSGi Framework it can be added to an existing Open-Xchange installation very easily.

Please Note: To get in favor of the latest minor features and bugfixes, you need to have a valid license. The article Updating OX-Packages explains how that can be done.

Install on OX AppSuite

Debian GNU/Linux 11.0

Add the following entry to /etc/apt/sources.list.d/open-xchange.list if not already present: 

deb https://LDBACCOUNT:LDBPASSWD@software.open-xchange.com/products/OXtender-stable/BusinessMobilityOXtender/DebianBullseye/ /

and run 

$ apt-get update
$ apt-get install open-xchange-meta-mobility

Debian GNU/Linux 12.0

Add the following entry to /etc/apt/sources.list.d/open-xchange.list if not already present: 

deb https://LDBACCOUNT:LDBPASSWD@software.open-xchange.com/products/OXtender-stable/BusinessMobilityOXtender/DebianBookworm/ /

and run 

$ apt-get update
$ apt-get install open-xchange-meta-mobility


Follow this link to download the User Manuals in different languages.


Now the Open-Xchange groupware and admin service needs to be restarted: 

/etc/init.d/open-xchange-groupware restart
/etc/init.d/open-xchange-admin restart

On the first login after the restart, all required database tables will be created.

Install on OX v6.22.x

Debian GNU/Linux 11.0

Add the following entry to /etc/apt/sources.list.d/open-xchange.list if not already present: 

deb https://LDBACCOUNT:LDBPASSWD@software.open-xchange.com/products/6.22/OXtender-stable/BusinessMobilityOXtender/DebianBullseye/ /

and run 

$ apt-get update
$ apt-get install open-xchange-meta-mobility

Debian GNU/Linux 12.0

Add the following entry to /etc/apt/sources.list.d/open-xchange.list if not already present: 

deb https://LDBACCOUNT:LDBPASSWD@software.open-xchange.com/products/6.22/OXtender-stable/BusinessMobilityOXtender/DebianBookworm/ /

and run 

$ apt-get update
$ apt-get install open-xchange-meta-mobility


RedHat Enterprise Linux 5

Please note, the last available version for RHEL5 is 6.22.0 

$ vim /etc/yum.repos.d/oxmobility.repo

[oxmobility]
name=Open-Xchange
baseurl=http://LDBACCOUNT:LDBPASSWD@software.open-xchange.com/OX6/6.22/6.22.0/OXtender/BusinessMobilityOXtender/RHEL5/
gpgkey=http://software.open-xchange.com/oxbuildkey.pub
enabled=1
gpgcheck=1
metadata_expire=0m

and run 

$ yum update
$ yum install open-xchange-meta-mobility


Now the Open-Xchange service needs to be restarted: 

/etc/init.d/open-xchange restart

On the first login after the restart, all required database tables will be created.

Download and Installation on Server Edition / App Suite for UCS

If you have purchased the OX Server Edition / App Suite for UCS, the Connector is part of the offering. Installation of the Connector with the following steps:

  • The new license is already registered at the LDB after purchase.
  • Log on at the Univention Management Console (UMC)
  • Make sure, that the correct LDB account has been selected in the UMC module "OX License Management"
  • Click on "App Center" at the UMC und switch to the tab "Repository Settings"
  • Within the component list, select "Connector for Business Mobility" and press the "Install" button

Installation on OX App Suite

The download and installation information for Open-Xchange App Suite product family (Open-Xchange Server Edition and Hosting Edition) is available at: http://oxpedia.org/wiki/index.php?title=AppSuite:Connector_for_Business_Mobility_Installation_Guide

Configuration

Mail Push

In order to get mail push, either install and configure the package open-xchange-push-malpoll, which is not recommended on large deployments or if you're using cyrus-imap, read the MailNotify Bundle‎‎ instructions on how to set up real mail push with cyrus.

Open-Xchange configuration

The configuration for USM and the EAS protocol can be found in these two configuration files: 

/opt/open-xchange/etc/usm.properties
/opt/open-xchange/etc/eas.properties


Make sure that the Open-Xchange Server URL is set properly in usm.properties. This needs to be the machine which provides the web interface. Usually, this is localhost, as the webserver and Open-Xchange run on the same machine. 

com.openexchange.usm.ox.url=http://localhost/ajax/

in case webserver and Open-Xchange aren't running on the same machine: 

com.openexchange.usm.ox.url=http://$FQDN/ajax/

(Where $FQDN is the fully qualified domain name of your frontend system)

On clustered setups, adjust the file /opt/open-xchange/etc/noipcheck.cnf to include the range of IP addresses of the servers on which USM is running.


Documentation about the configuration parameters can be found inside the configuration files. If you change any attribute at the configuration files, the Open-Xchange groupware service needs to be restarted.

Enabling ActiveSync for user accounts

In order to use synchronization through ActiveSync, this feature needs to be activated for user accounts. You can either activate it for specific users or a whole context.

Activating ActiveSync for specific users: 

/opt/open-xchange/sbin/changeuser -c 1 -A oxadmin -P admin_password -u testuser --access-usm on --access-active-sync on

Activating ActiveSync for a whole context: 

/opt/open-xchange/sbin/changecontext -c 1 -A oxadminmaster -P admin_master_password --access-usm on --access-active-sync on

Log files and issue tracking

When facing problems with synchronization, there are several ways to get more information than provided via device or platform specific error codes.

Server-side logging: Options

By default, the log output is non verbose. Only severe errors will be logged. To enable a more detailed log output, the logging mechanism needs to be configured. This depends on the used mechanism.

There are three different mechanisms, depending on your server version: If you use 7.4.2 or later, we use logback. Before that, the default was commons logging, unless you explicitly installed Log4j.

Logback

As said, this is the default after (and including) 7.4.2. To get more verbose output, simply extend the logback.xml configuration file by the following line: 

 <logger level="DEBUG" name="com.openexchange.usm"/>


Commons Logging

This is the default logging mechanism prior to 7.4.2. If the Open-Xchange Server log output is written to var/log/open-xchange/open-xchange.log it is an indicator that this mechanism is in use. To make the log output more verbose, add the following parameter: 

vim /opt/open-xchange/etc/file-logging.properties
[...]
com.openexchange.usm.level=FINE

This will enable a software debug log for all components using USM, including EAS after restarting Open-Xchange Server.

Log4j

If the package open-xchange-log4j is installed, Open-Xchange Server will log via a UDP network socket. In most cases a syslog daemon is listening to this socket and will write the log data to a platform specif file like /var/log/syslog. To make the log output more verbose, add the following parameter: 

vim /opt/open-xchange/etc/log4j.xml
[...]
   <category name="com.openexchange.usm">
       <level value="DEBUG"/>
       <appender-ref ref="SERVER_LOG"/>
   </category>

Please note that the XML syntax must be correct. This will enable a software debug log for all components using USM, including EAS after restarting Open-Xchange Server.

Client-side logging: EAS debug logfile

While the generic Open-Xchange Server log file will keep track on errors reported by the software components, the EAS debug log file will print all data transfered to the device as XML. Please note: this log file may contain confidential data about the users personal groupware objects. Make sure that no unauthorized access to those log files is possible in order to maintain privacy. Change the configuration file accordingly and set a output path which can only accessed by authorized persons. 

vim /opt/open-xchange/etc/eas.properties
[...]
com.openexchange.usm.eas.debug_log=/tmp/EAS-debug.log

This will enable a XML based debug log for all EAS connections, after restarting Open-Xchange Server.

Network traffic

When using unencrypted connections between the device and USM and USM and Open-Xchange Server (not recommended), it's possible to analyze the network traffic with tools like ngrep or wireshark. When using encrypted data connections using SSL, the transfered data can be decrypted using the corresponding private key. Please note that there are two network streams, one from the device to USM (external) and one from USM to OX (internal).

Bug-Reporting

Please report bugs via the Open-Xchange Bugzilla:

Direct link to Open-Xchange Bugzilla

  • Product: Connector for Business Mobility
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