The service principal name for the VMRC server could not be registered. Automatic authentication will always use NTLM authentication. Error 0x80072098 - Insufficient access rights to perform the operation.

Note: This article was originally published in 2006. Some steps, commands, or software versions may have changed. Check the current General documentation for the latest information.

One way to solve it is available at:
http://support.microsoft.com/default.aspx?scid=kb;en-us;890893

pretty much the cause of the problems is that:
This issue occurs because the Network Service account that Virtual Server uses does not have permission to write the SPNs to Active Directory. Therefore, the SPN for vssrvc/Computer_Name and vssrvc/Fully_Qualified_Domain_Name are not registered in Active Directory.

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