It is best to change accounts using an In-Private window or a different browser/different computer to access the Pulseway side, then you can change the account if you used your own admin account. The Pulseway side had issues with not wanting to accept our High Volume Email account and weirdly Pulseway blocks M365 in SMTP settings. I don't want to create a separate licensed M365 account just for Pulseway emails. We went with our SMTP2Go account instead.