Once you have started receiving email notifications from your vendor and you have already been invited to the portal, your email address cannot be changed. That’s because your email serves as your login ID. If you have an Admin role, invite your new email address to the portal and then disable your old email.
Log in to the portal using your current email (the one you need to change). Open the Users page, click Add User, enter your new email address, then click Invite User. Once you’ve accepted the invite and logged in with your new email address and password, disable your previous email:
If someone else on your team needs to have their email changed, follow the same process.
If your old email address was the default, or primary contact for your company, you should contact your vendor; they will probably need to update your customer record by setting your new email address as the new default.