Instant Messaging

Client System Policy Settings

You can configure your deployed instant messaging clients with custom behaviors and settings. Use Microsoft System Management Server (SMS), or a similar tool, to set the appropriate system registry settings on each client machine.

All policies are stored in the following registry key:


The policies and their values are as follows:

Policy Setting What it does
DisableCrossPromo 0 = not disabled; non-zero = disabled. The default is 0. This registry setting disables the ad banner space. When disabled, you will only see the MSN logo with no dynamic ads or news coming from MSN.
DisableUpdates 0 = not disabled; non-zero = disabled. The default is 0. This registry setting controls how the client handles the automatic upgrade notices that the MSN Messenger Service sends out when a new client needs to be installed.
ExchangeConn 0 = Normal operation
1 = Exchange always primary
2 = Exchange Only
This registry setting allows you to control the Instant Messaging service provider that is in use and visible by the client, as well as the primary default service provider. This allows you to disable MSN Messenger Service if you do not want clients to use the MSN Messenger Instant Messaging functionality.
IMWarning Text to appear when IM window is opened. The default is to use standard reminder. This registry setting allows you to set the warning message that appears in the message window. The default message is a warning that the user should not give out credit card numbers and passwords over Instant Messaging sessions. The string may be set to any custom message you want to display to the user. If this string is replaced with a blank space, a message will not appear.
DefaultNTLMDomain Text containing the desired default NTLM domain for NTLM Auth. This string value allows you to set the location of the domain that should be used for default NTLM authentication.

Note   Another registry setting, GCLocation, is used to override the domain of the Instant Messaging user. Instead of logging on to, this setting changes the domain that is used for searching for other Instant Messaging users. For example, if the GCLocation was set to, you may be logged into, but if you carry out a search, it would query This registry setting does not occur with HKLM policies, and is stored in the following registry key:


Related Topics

Distribute the Client Software