Create a new contact in O365 from an email message

Step-by-Step

Outlook 2013, Outlook 2016 (Windows)

1. Open the message and right-click the email address you want added to your Contacts list.
2. Click Add to Outlook Contacts.
3. Edit the contact and click Save & Close.

Outlook on the Web (BWA)

1. Open the message and right-click the email address you want added to your Contacts list.
2. Click View details.
3. Click Add to Outlook Contacts.
4. Edit the contact and click Save & Close.

Outlook 2016 (Macintosh)

1. Open the message and hover over the email address you want added to your Contacts list.
2. When the pop-up window appears, click the lower right-most icon in that window with a yellow pop-up named "Open Outlook contact".
3. This will create the Contact card that you can update and then Save & Close.