Avamar falied to take backup of all virtual machine
Recently I encountered an issue where Avamar failed to take backup. Logs stating insufficient Permission in the host OS 2018-02-19 06:59:56 avvcbimage Error <0000>: [IMG0008] Failed to connect to virtual disk [VMAXDS] VM/VM-000002.vmdk (3014) (3014) Insufficient permissions in the host operating system (Log #2) We verified the permission on the vCenter but no luck,However on demand backup from local Account is with same level of access is successful. While investigation further we found that there are errors related to DNS, and even some DNS server are getting backed up via avamar. We asked to remove DNS from Avamar back considering VM stun operation during the backup but it did not help to resolve the issue. Later on we found that DNS server which is hardcoded in Avamar was decommission due which Domain ID's were unable to run backup on vCenter