How can I set the default address in the from field in the cases compose email drawer?

My users are part of teams which have multiple email addresses they can send from. These emails are configured as a outgoing email account in the email module. The majority of the time, they will use one particular email address, but the address they use most is third in the "From" drop down of outgoing email addresses when they use the compose email drawer in the cases module. I have read through several support articles involving version 7&8 but don't seem to cover my issue. My objective is to have the ability to set a default for this drop down in the cases drawer per user. Can someone give me some insight on how I can achieve this?

Here are some of the articles I have combed through so far. 

https://community.sugarcrm.com/message/105086-re-sugar7-how-to-change-default-from-address-in-email-drawer?commentID=105… 

Sugar7 how to change default "From" address in email drawer? 

https://community.sugarcrm.com/message/99731-re-v8-set-from-address-in-compose-email-to-cases-queue?commentID=99731#comm… 

v8 Set From Address in compose-email to Cases queue