Amongst a couple others (which are working fine) i get the following warning on one of my Linux VM's:
31-3-2017 22:05:06 :: Failed to index guest file system. Failed to upload index summary
Created a root user according to manual and all is working fine for accessing the VM for the users. https://helpcenter.veeam.com/docs/backup/vsphere/credentials_manager_linux.html?ver=95
Strange thing it is not happening always.