The first indications of change: Skype for Business
My first indication of change was that I got logged out of Skype for Business. When I logged back into Skype for Business with my @vt.edu I decided it also might be best to just sign out of Microsoft Office completely, reboot my computer and then log in without the w2k.
Now that you have your new login for Office 365 you will need to change that for Skype for Business.
When you get to your login screen, you may need to click on the gear and choose FILE => Change Sign-In Address
From there you’ll be taken to a screen that will allow you to change your sign-in address. From there, you can log in and get yourself connected to Skype for Business.