I assume that your environment is provided by VMware (OTT = Over the Top).
I don't think the activated Edge password is admin/admin now.
I think it was changed from some version.
The credentials for the local UI of the activated Edge can be viewed from the Orchestrator.
View or Modify Edge Information
https://docs.vmware.com/en/VMware-SD-WAN/5.0/VMware-SD-WAN-Administration-Guide/GUID-A77F2BAA-32E6-4...
I think the "SSH to Edge" feature was released in version 5.0.
I have not tried SSH connection yet.
I am not sure if it works with earlier Edge software versions.
What's New in Version 5.0.0
https://docs.vmware.com/en/VMware-SD-WAN/5.0/VMware-SD-WAN-Administration-Guide/GUID-A8DF422D-6169-4...
Access SD-WAN Edges Using Key-Based Authentication
https://docs.vmware.com/en/VMware-SD-WAN/5.0/VMware-SD-WAN-Administration-Guide/GUID-FE6EE4E3-39D8-4...
