Desktop: In the left navigation bar, go to User Profile, then Contact Information, select “+ Add Email/Phone,” choose the contact type from the dropdown, enter the updated contact information in the text box, and click Save.
App: Tap the menu icon (☰), then User Profile, then Contact Information, Select + Email/Phone, choose the contact type from dropdown and enter the updated contact information in the text box, then select save.
In order to delete an existing email or phone number, you must first add an additional email or phone number. After adding the new, the old can be deleted.