Hi what is the status of the agent in the virtual Machine ?
Check the connectivity and follow the steps below
Step 1: Check Azure VM health
Step 2: Check Azure VM Guest Agent service health
Step 3: Check Azure VM Extension health
Step 4: Check Azure Backup VM Extension health
All the details for each step are defined here :
https://docs.microsoft.com/en-us/azure/backup/backup-azure-troubleshoot-vm-backup-fails-snapshot-tim...