You may change the email address associated with your account. Your email address is used for CosmoLex notifications you choose to receive.
Be sure not to change your Login ID by mistake. In CosmoLex, your Login ID (username) is usually your email address. You can choose to keep it this way or change it to a preferred Login ID.
How to change email address
Go to Account Management Tab > User Management section and find the user.
Select the user, click edit and change the email address here, then save.
As a result, your login name will remain the same, but any email communications will be with the new email address.