During Legacy Calendar or Legacy Mail synchronization, the following error is encountered.
RpcStoreAdmin::InitConnection Error -2147221231 ClassFactory cannot supply requested class : CExchAttendantCalls::ConnectEx failed! File: 'aeExchRpc.cpp' Line: '154'
RpcStoreAdmin::InitConnection Warning 1722 The RPC server is unavailable. Server name - AgentHost, service name - Quest Migration Attendant for Exchange service.
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