Your forum account is your main-site account — the forum signs you in through the main site (SSO). That means all account management happens on the main site: Email — change it on your main-site profile; the forum syncs automatically. Password — reset via the main site. Username — managed on the main site; the forum follows. Account deletion — handled through the main site as well. If anything looks out of sync here, it will catch up within an hour of the change.