2 answers
@dhianefka nafasyah
It's tableau online or tableau server both are different. In tableau server you will get the keys but in tableau online you will get the site activation link on your email ID. if you have license key you can directly inject on the activation page. But for tableau online you have to activate the site and site will only activate with same email ID you cant change the email id. for changing your email ID you have to raise a case with tableau team.
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Regards,
Kaustubh