| Installation and Configuration Guide | System requirements | 
Unsupported environments
| Item | Description | 
| 
 | 
 | 
| DMZ | The BlackBerry Enterprise Server and BlackBerry Enterprise Server | 
| 
 | components, with the exception of the BlackBerry Router, do not support | 
| 
 | installation in a DMZ. | 
| 
 | 
 | 
| messaging server | The BlackBerry Enterprise Server for Microsoft Exchange (and all BlackBerry | 
| 
 | Enterprise Server components) does not support installation on the computer | 
| 
 | that hosts the messaging server. | 
| 
 | 
 | 
| email application | The BlackBerry Enterprise Server and BlackBerry Enterprise Server components | 
| 
 | do not support installation on computers that host email applications such as | 
| 
 | Microsoft Outlook. Email applications use data files that can cause conflicts with | 
| 
 | the BlackBerry Enterprise Server components. As a result, the BlackBerry | 
| 
 | Enterprise Server components might not function as expected. | 
| 
 | 
 | 
| instant messaging server | Any of the following environments: | 
| 
 | • If you configure the BlackBerry Enterprise Server for high availability, the | 
| 
 | primary BlackBerry Enterprise Server instance and standby BlackBerry | 
| 
 | Enterprise Server instance do not support more than one type of instant | 
| 
 | messaging server in a BlackBerry Enterprise Server pair. For example, if you | 
| 
 | install the BlackBerry Collaboration Service for use with Microsoft Office | 
| 
 | Communications Server 2007 on the primary instance, you must also install | 
| 
 | the BlackBerry Collaboration Service for use with Microsoft Office | 
| 
 | Communications Server 2007 on the standby instance. | 
| 
 | • A BlackBerry Enterprise Server or BlackBerry Enterprise Server pair that | 
| 
 | connects to multiple instances of the BlackBerry Collaboration Service does | 
| 
 | not support more than one type of instant messaging server. You must use | 
| 
 | the same type of instant messaging server for each local or remote | 
| 
 | BlackBerry Collaboration Service that you connect to a BlackBerry | 
| 
 | Enterprise Server or BlackBerry Enterprise Server pair. | 
| 
 | 
 | 
| BlackBerry Collaboration Service | If you install the BlackBerry Collaboration Service for use with Microsoft Lync | 
| 
 | Server 2010, the BlackBerry Collaboration Service does not support using | 
| 
 | ocscore.msi or ucmaredist.msi from the Microsoft Lync Server 2010 installation | 
| 
 | files on the computer that you install the BlackBerry Collaboration Service on. | 
| 
 | You must use ocscore.msi and ucmaredist.msi from Microsoft Office | 
| 
 | 
 | 
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