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How do I resolve a "presence unknown" display issue when trying to build an OCS Access Edge?

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As many of you are probably aware, Windows 2003 comes with a larger number of root authorities (i.e., list of third-party certificates that the operating system will "trust"). Unlike Windows 2003, Windows 2008 has a much smaller list. Make sure that the root authority certificate from your AE that is running Windows 2008 is also in the trusted root authority list of the federated partner. For example, the root authority certificate for Comodo is NOT installed by default on Windows 2008.

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This was first published in June 2010

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