Tom Arbuthnot MVP
Tom Arbuthnot MCSM Communications

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Tag Archives for " error "

Lync Certificate Request Wizard Fails: “The RPC server is unavailable” because Firewall/ISA/TMG site-to-site VPN blocking RPC

Published 29/01/2012 - 7 Comments

While building a fresh Lab server I hit this error on a routine part of the wizard setup: “Command execution failed: Cannot connect to Verify that you can connect to the server, have the appropriate permissions, and that you logged on with the correct credentials.”   Error: The RPC server is unavailable. (Exception from […]

Exchange Management Console pointing to wrong server “The attempt to connect to using "Kerberos" authentication failed”

Published 01/11/2011 - 63 Comments

I came across this error during an Exchange 2010 Unified Messaging deployment. The EMC would not connect: "The attempt to connect to using "Kerberos" authentication failed: connecting to remote server failed with the following error message : The WinRM client cannot complete the operation within the time specified.  Check if the machine name is […]