A connection test in the Conferencing Add-in for Office Outlook is unsuccessful where only an A record is available but no SRV record is available in an Office Communications Server environment

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Article ID: 2432099 - View products that this article applies to.
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Consider the following scenario:
  • In a Microsoft Office Communications Server (OCS) environment, only an A record for the OCS front-end server is available. No Service Location (SRV) record for automatic client logon is available.
  • You try to use the Test Connection function in the Conferencing Add-in for Office Outlook, which uses automatic discovery.
In this scenario, the connection test is unsuccessful. Therefore, you cannot schedule conference calls in the Conference Add-in for Office Outlook.


This issue occurs because the result of a DNS query against an A record does not match the corresponding settings on the OCS front-end server. 


To fix this problem, install the following cumulative update:
2433228 Description of the update for the Live Meeting Conferencing Add-in for Outlook: November 2010


To work around this issue, use one of the following methods:
  • Use an SRV record instead of an A record for the OCS front-end server in the OCS environment. For more information, click the following link to view the Microsoft TechNet article:
    Create and Verify DNS Records for Your Server or Pool
  • In Advanced Connection Settings in Conferencing Add-in for Office Outlook, specify the following settings to comply with the settings on the OCS front-end server:
    • Server name and port number.
    • Connection protocol.
    Note: You can also use a Group Policy to automate this step.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Article ID: 2432099 - Last Review: August 26, 2011 - Revision: 2.1
  • Conferencing Add-in for Microsoft Office Outlook 2007
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