The passwords can be removed from the vmx file as they are no longer required after the first boot of the appliance. In order to do that, Follow the below steps:
Shut down the SDDC Manager VM.
Via SSH, login to one of the ESXi hosts in the Management Cluster, which hosts the SDDC Manager VM. A good candidate is the host where the SDDC Manager has been running prior to being shut down.
Note: SSH might need to be enabled on the host prior to that.
Locate the sddc-manager.vmx file. It should be present in a location like this:
/vmfs/volumes/<vsan-datastore-name>/sddc-manager/sddc-manager.vmx
Make a backup copy of the sddc-manager.vmx file:
cp /vmfs/volumes/<vsan-datastore-name>/sddc-manager/sddc-manager.vmx /vmfs/volumes/<vsan-datastore-name>/sddc-manager/sddc-manager.vmx.bak
Using vi, edit the sddc-manager.vmx, remove the property guestinfo.ovfEnv. It should look similar to the below:
guestinfo.ovfEnv = "<?xml version=|221.0|22 encoding=|22UTF-8|22?>|0A<Environment|0A
...
|0A</Environment>|0A"
Save the file and exit vi.
Start SDDC Manager VM again.
Logout from the ESXi host and disable SSH if needed.