Is this even possible to include a hidden personal email address for F1 users on profile card

Checking in to see if this is possible - 

Goal:

• To pull personal email addresses from F1 users that are stored in PeopleSoft and add them into the MS profile card in the email spot, then hide them from public view
• We want to have the ability to send manually curated news and automatic "news you may have missed" from the newsfeed via our SharePoint intranet to their personal email addresses

Current state:

• Staff's personal email addresses are stored in PeopleSoft, and they have the ability to edit them
• We have processes that run each week comparing AD Attribute Information against PS Attribute Information and updates accordingly
• All staff have access to PeopleSoft and use their Microsoft login
• Staff are authenticated through Azure
• This group of staff have F1 licenses and tend to be seasonal workers; it's cost-prohibitive to upgrade their licenses

Ideal state:

• The solution uses existing O365 or other corporate software, such as a Microsoft Delve
• The solution pulls staff's personal email address information from PeopleSoft, where it's currently stored and allows staff to opt in and out from there
• Alternatively, we use an MS application like Delve for staff to add their email address and opt in or out of corporate communications
• The solution provides the ability for the staff's personal email address NOT to be displayed in the MS profile card found when hovering over a staff person's name