How do I set up my Hotmail account on my S6 as the defaut mail sender?

[ynot zemog]

How do I set up my hotmail account on my s6 as the defaut mail sender

It is a work phone, there is also ibm notes traveler set up on phone.
When I choose a contacts email to send an e-mail it wants to use this account as the mailer.
I don't want to emailing friends from my work account.