How to Install a Trusted Root CA certificate on OSX Leopard for use with Messenger for Macintosh.

Author: Michael Wagner

Publication date: March 2008

Product version: Office Communications Server 2007 R2

 Add private certificate to the x509 Anchors keychain

  1. Open keychain access application.
    1. Use finder and find the HDD/Applications/Utilities/Keychain file and start the application.
  2. Add the X509 Anchors to the view, it is not in the view by default.
    1. File menu.
    2. Add keychain
      1. Open HDD/System/Library/Keychains/X509Anchors
      2. Caution not to use the HDD/Library/Keychain the file is not there
  3. Import the certificate into the X509 Anchors
    1. Highlight X509 Anchors
      Import the Root Certificate or Chain
    2. Choose File->Import Items
    3. Browse to find your Root CA certificates files you need to add then choose open
    4. Password prompt for root access
    5. Pop up asking if you want to trust the certificate
    6. Click Always Trust

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Comments (3)
  1. Rick says:

    do I need to join mac client to windows domain in order oc user can sharing audio and video externally?

  2. Tom Laciano (Microsoft) says:


    No the Mac workstation and client do not need to be joined to the domain for audio and video externally. The client sign-in process with account and password is what authenticates and then authorizes your use of the features. Do keep in mind the administrator assigns policies to a user which may restrict whether the full feature is available to you.

  3. thank you this information

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