I had a strange problem with one of my VM’s. The VM-ID was changed and this change was not forwarded to my vCenter server. I use Veeam Backup for creating backups and the job skipped this VM with the following error:
This problem can be solved by restarting the services on the ESX server and the vCenter server.
The following command will do this on the ESX Server.
service mgmt-vmware restart
For vCenter (Windows) you can do this from the command line:
net stop "VMware VirtualCenter server"
net start "VMware VirtualCenter server"
After restarting the services, the backup job completed successfully.
ICT-Freak.nl 
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