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When setting up a new Veeam demo I was presented with a problem where I was unable to mount the new Veeam NFS store, upon inspection I was unable to mount any NFS store to my host.

The error I was receiving was as follows

Error performing operation: Unable to resolve hostname ‘demo-veeam.Demo.local’

My new VM wasn’t however called demo-veeam and I got the same error when trying to mount any NFS store. Looking in datastores there were no NFS datastores showing and from the command line when using the esxcfg-nas -l option I received the same error

# esxcfg-nas -lError performing operation: Unable to resolve hostname ‘demo-veeam.Demo.local’

To resolve this I added a dummy host name entry for demo-veeam.demo.local into the \etc\hosts file

I was then able to run

# esxcfg-nas -lVeeamBackup_DEMO-VEEAM is /VeeamBackup_DEMO-VEEAM from demo-veeam.Demo.local unmounted unavailable

I was then able to delete this old NFS mount with

# esxcfg-nas -d VeeamBackup_DEMO-VEEAM

After cleaning up my hosts file I then retried adding the NFS datastore through the GUI and it worked correctly.