In the Password Management section on the SDDC Manager UI, the backup user is not shown.
Connecting to the Postgres database and review the sddc_manager_controller table, shows missing data for the BACKUP user.
During a migration based upgrade, where a new SDDC Manager VM is created and the old data is copied from the older VM, data about the backup user in not migrated.
This is a known issue affecting VMware Cloud Foundation 3.8.
To workaround this issue, please see the steps below.
Open a SSH session to the SDDC Manager and change to the root user:
su -
Connect to the Postgres database:
psql -h localhost -U postgres
Run the below command:
update credential set entityid = ( select id from sddc_manager_controller where vm_management_ip_address='<new_sddc_vm_ip>') where entitytype='BACKUP' and credentialtype='FTP';