Launched the wizard and took me straight to Office 365 option – easy peesey:
Postman recommends 
SMTP-STARTTLS with Password (Login) authentication to host smtp.office365.com on port 587.
Socket:
SMTP – office365.com:587
Mandrill API
SendGrid API
Mailgun API
Authentication:
But I can’t get past step 6 – UID:
Push To Chrome Extension
This is an extra notification to the selection above. You can download the chrome extension here.
Your UID as you see in the extension.
Cannot find UID
Launched Office 365 extenssion an it is asking for a serial key.
Do you have a way to send screenshots ?