@MojangSupport Migration completed. Now it won't accept my password. And the "Forgot Password" link isn't sending out a reset email. Help appreciated. Is it too late to separate yourselves from Microsoft? Sigh.
Danielle saves the day. Why the heck isn't this in the FAQ? Somebody missed a step....
DanielleE @_DaNi_eLLe_E
...You have to go back and "add new account" to the launcher. Then put in your micro username and pass. I was finally able to log in to my migrated acct doing this.