A common issue we see is clients getting an error stating “Cannot Synchronize Address Book”.  It looks like in the image; there are several reasons clients could get this error.  One possible reason is the TLS Certificate hasn’t been selected yet in IIS on your OCS 2007 Front End Server (in a Standard Edition Deployment) or on your Web Components Server (in an Enterprise Edition Deployment). 

To see if this is the cause, do the following:

• Open the Internet Information Services (IIS) Manager from Administrative Tools.
• Expand the Computer and then Web Sites.
• Right click on Default Website and then click on Properties.

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