The title says it all. I can't find anything except an old post from 2017 that mentions a workaround. There must be someway to revise the login but maybe not.
After some research with the Trimble ID team, I am sorry to say that you cannot change an email address tied to an existing TID account. You will need to create a new account to use a new email address.
Thanks for looking into this. I thought that might be the case but one never knows. - George
It seems like it is possible to change Trimble ID now