Step-by-step plan to change an email address if the new email address is unknown:
Go to "My profile": Navigate to the section 'My profile'.
Section ''Login": In the login part you'll see the email address that is linked to your user account.
Click the edit icon: On the right of the email address you'll see an orange icon shaped linke a pencil. Click it to edit the field.
Enter the new email address: After clicking the edit icon a pop-up will appear. Here you can enter the new email address and confirm. Click the button 'Change your login email address' to make the change.
Save: After entering the new email address you can save your changes at the bottom of the page.
Step-by-step plan to change an email address if the new email address is already known:
Add new user:
Log in with the new email address:
Deactivate old user: