If you selected a method other than Mail or Messages, add recipients by doing one of the following:
Type a name, email address, or phone number for each recipient.
Click the Add button , then follow the steps to iCloud.com.
If you were added to the note by someone else: Click the link you received, then click Open.
Note: For security, you can open the note only if the email address or phone number used to send you the invitation is associated with your Apple ID. If it isn’t, you’re asked to add it. See Customize toolbars