Wildcard Certificates
Wildcard certificates in the format of *.<domain> have become increasingly popular because they provide a way to secure a large number of websites at a low cost by using only a single certificate. Unfortunately, many functions in Lync Server simply don’t work well or at all if a wildcard certificate is used. At this time, the recommendation is to avoid using a wildcard certificate for any Lync Server roles.
Specifically, older Lync or Office Communications Server Phone Edition clients will be unable to access the Device Update Service, and federation with public IM connectivity or down-level partners running Office Communications Server will not work properly. There is a cumulative update available that allows Lync Phone ...
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