Home > SCVMM, SCVMM R2, Virtualization > VMM tricks: Adding VMware Host error “Unable to connect to the remote server.”

VMM tricks: Adding VMware Host error “Unable to connect to the remote server.”

Sometimes when you try to add VMware host ( VCenter) you see this error

“VMM cannot complete the VMware operation on VMware Host IP server because of the error:
Unable to connect to the remote server.Resolve the issue in VMware and then try the operation again.
ID 12701:Details: Unknown error (0x194) ”

VMM is using different protocols to manage VMware host and communicate with as per MS http://technet.microsoft.com/en-us/library/cc764268.aspx

Connection type Protocol Default port Where to change the port setting
VMware Web Services communication HTTPS 443 VMM Administrator Console, registry
SFTP file transfer from VMWare ESX Server 3.0 and VMware ESX Server 3.5 hosts SFTP 22 Registry
SFTP file transfer from VMM server to VMWare ESX Server 3i hosts HTTPS 443 Registry

To manage VMware Virtualcenter server, VMM need dispatch VMMagent to this server which will involve some sFTP and HTTPS communication and traffic. It appears there are some failures during the process.

so check if you are able to connect to VMware Virtual center on ports 22,443 and then try again.

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