Introduction to Cisco Unified Presence Integration with Microsoft Exchange
Revised: November 28, 2013
•Microsoft Exchange Calendaring States on Cisco Unified Presence
•Restrictions and Limitations
Microsoft Exchange integration with Cisco Unified Presence allows users to incorporate their calendar/meeting status in Microsoft Outlook into their availability status on Cisco Unified Presence.
The following sections identify the types of deployments available and describe each.
WebDAV (Web Distributed Authoring and Versioning) is an extension of HTTP that facilitates creating, changing and moving documents on a server as well as editing properties of a file. WebDAV can be used to access Microsoft Exchange mailboxes over HTTP connectivity. Each folder, message, calendar event, contact etc., has a URL that can be used to access it. Cisco Unified Presence can use WebDAV to gather information on calendar events. WebDAV is deprecated in Exchange 2010 and beyond.
Figure 1 Microsoft Exchange Integration with WebDAV over Cisco Unified Presence
EWS (Exchange Web Services) is a newer set of Web services that allow interaction with Microsoft Exchange mailboxes and contents over HTTP. EWS provides access to much of the same data that is made available through Microsoft Outlook. It provides more services and is more robust and easier to use than WebDAV, as well as being better able to handle exchange-specific data. EWS moves several responsibilities from the client computer to the server.
Microsoft Exchange Integration over EWS with Cisco Unified Presence
Microsoft Exchange Calendaring States on Cisco Unified Presence
Exchange integration with Cisco Unified Presence allows users to incorporate their calendar/meeting status in Microsoft Outlook into their availability status on Cisco Unified Presence. The table below shows the reachability mappings, and how Cisco Unified Presence correlates the status of meetings (as shown in Microsoft Outlook calendar) in the availability status of users on Cisco Unified Presence.
Table 1-1 Aggregated Availability State Based on Calendar State
Cisco Unified Presence State
In a meeting
Presence Gateway Options
You must configure an Exchange Server as a Presence Gateway for calendaring information exchange on Cisco Unified Presence. The Presence Gateway to Exchange enables the Cisco Unified Presence Server to reflect the availability information (calendar/meeting status) status of the user on a per-user basis.
Restrictions and Limitations
The following are restrictions and limitations for integrating Cisco Unified Presence with Exchange:
•You can either configure one WebDAV Server or multiple EWS servers. You can not mix WebDAV and EWS server types in your deployment.
•You can add, update or delete one or more EWS servers with no maximum limit. However, the Troubleshooter on the Presence Gateway window is designed to only verify and report status of the first 10 EWS servers that you configure.
•This release of Cisco Unified Presence does not support the Exchange autodiscover service. The autodiscover service assumes that a load-balancing mechanism is already in place across the Client Access Servers (CAS).