Hello
all the VMs use the root account to be accessed? root used to be used to access the ESX host and not the rest of VMs, for the VMs use the credentials assigned to the operating system as administrator, also you can specify the credentials used to certaing services suchs as Exchange, SQL, and so on.
For GRT enabled backups, you must specify the source credential account with admin rights. Exchange Admin, SQL Admin whatever you use.
please check at the admin guide, the VMware and Hyper-V agent sections specify what credentials must be used and the sections for applications specify what other credentials are needed for each GRT enabled backup.
