Mac Mail won't let me add an office 365 account after el capitan update?
It repeatedly says "unable to verify username and password" and asks me to supply and interal and external url
was working fine before el capitan update but for other reasons i had to delete the mail accounts. now it won't let me add them back
any help?
cheers
nick
MacBook Air (13-inch, Early 2014), El Capitan