I downloaded the VHD and deployed on-prem. I started the VM and signed in successfully. When I provisioned the administrator user I got the following error message.

I have three Microsoft accounts, so I tried one of the other accounts. Same error message. Tried the third account with the same result.
On a hunch, I tried to access the local instance of the application (usnconeboxax1aos.cloud.onebox.dynamics.com) and was prompted to choose an account to sign in with. Strangely, listed were all three accounts I thought had failed to provision.

I was able to access the app not only on the first account that failed, but all three.

Can I assume error did not impact the provisioning, nor anything else? Also, how can I un-provision (remove) the two additional, unnecessary accounts?
Thank you in advance for any and all responses.