To allow OCS to accept SIP requests from the IM and Presence Service without being prompted for authorization, you must configure host authorization entries on OCS for each IM and Presence Service node.
If you are configuring TLS encryption between OCS and the IM and Presence Service, you must add two Host Authorization entries for each IM and Presence Service node, as follows:
If you are not configuring TLS encryption, then you add only one host authorization entry for eachIM and Presence Service node. This host authorization entry must contain the IP address of the IM and Presence Service node.
The following procedure describes how to add the required host authorization entries.
Note
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For Standard Edition, you must perform this procedure on all Standard Edition servers.
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For Enterprise Edition, you must perform this procedure on all pools.
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