VMM tricks: Installing SCVMM on a host with a name containing “-SCVMM-” fails with Error 257
This one is funny..Source
Well, the title says it all. If the host you’re trying to install SCVMM on has a name that contains “-SCVMM-” in upper case letters, setup fails with Error 257.
Resolution: Use a slightly different name, like “MUC-SCVMMR2-1” or “MUC-SCVmm-1”,
The reason is that the uppercase string “-SCVMM-” is used internally for host cummincation by SCVMM.