You apply Update Rollup 1 or Update Rollup 2 for Exchange Server 2007 Service Pack 3 (SP3) on the passive node of a single copy cluster (SCC). In this scenario, the Microsoft.Exchange.Search.ExSearch.exe
(Microsoft Exchange Search Indexer) process consumes 100% of CPU resources and many UDP ports. During this time, the Microsoft Exchange Replication Service service and Cluster Service service cannot start, and you receive the following error message:
Win32Exception: There are no more endpoints available from the endpoint mapper
This issue only occurs when the Microsoft Exchange Search Indexer service is started before the Microsoft Exchange Replication Service service and Cluster Service service are started.