Cisco Systems OL-14619-01 manual Considerations for Cisco-Provided, Dedicated Infrastructure

Chapter 4 Designing a Cisco Unity System with Exchange as the Message Store

Considerations for Cisco-Provided, Dedicated Infrastructure

Considerations for Cisco-Provided, Dedicated Infrastructure

Note the following considerations when a Cisco Unity implementation will use Cisco-provided, dedicated Exchange and Active Directory infrastructure:

•Ensure that the servers selected for Cisco Unity and for Exchange are able to handle the proposed number of users. For information on selecting servers, see the Cisco Unity Supported Platforms List at http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_data_sheets_list.html.

•If the customer is installing Cisco Unity and Exchange servers in multiple locations and if they will all be in the same Active Directory forest, ensure that Active Directory sites are configured.

•If two or more Cisco Unity servers are being installed in a forest but they are being installed in different forest roots, configure a one-way trust to enable client authentication. For more information, see the “Grant Unity Access” section in the Client Access in a Voice Messaging-Only Deployment (Cisco Unity Version 4.0) white paper at http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_white_papers_list.html.

Note The version of GrantUnityAccess shipped with Cisco Unity 5.0 requires a two-way trust due to caveat CSCsi68156. An updated version of GrantUnityAccess that does not have this problem is available on the “4.x/5.x Tools” page on the Cisco Unity Tools website at http://ciscounitytools.com/4_x_tools.htm.

•Within a given data center, if the location will have two Exchange servers, we recommend that the customer make both servers DC/GCs and run DNS on both servers. If the location will have four or more Exchange servers, we recommend that the customer make half of the Exchange servers DC/GCs and run DNS on two of them.

•In a Voice Messaging configuration, to prevent the message store from filling the hard disk, some customers configure storage limits in Exchange, and use Cisco Unity Message Store Manager to delete old messages. For example, messages older than 30 days might be moved to the deleted-messages folder, and messages older than 60 days might be purged. For more information on Message Store Manager, see the Message Store Manager Help at http://ciscounitytools.com/HelpFiles/MSM/MSMConsoleHelp_ENU.htm.

•The Cisco Unity Voice Connector for Microsoft Exchange, which is required for communicating with another voice-messaging system by using AMIS, the Cisco Unity Bridge, or VPIM, must be installed on the partner Exchange server. The Voice Connector can also, optionally, be installed on one or more other Exchange 2000 or Exchange 2003 servers to optimize message routing via Exchange’s native, cost-based routing. (The Voice Connector cannot be installed on an Exchange 2007 server.)

•The customer can configure Exchange clustering by using the Voice Mail Run-Time Edition of Microsoft Exchange Server 2003 Enterprise Edition that is shipped with Cisco Unity. However, the customer is responsible for supporting the Exchange cluster and any custom hardware or configuration.

•In a Voice Messaging configuration, to help prevent Exchange transaction logs from filling the hard disk, a wizard in Cisco Unity Setup prompts the installer to change the circular-logging setting for any message store in the forest for which circular logging is turned off. If the customer is using an Exchange-aware backup application to back up Exchange message stores and clear transaction logs, the installer can choose not to change the circular-logging setting.

Design Guide for Cisco Unity Release 5.x

OL-14619-01 4-9