I have just migrated a customer from simple imap mail to Office 365. Multiple of these users has more than one acount.
They have their personal mail eg. firstname.lastname@example.org but some need other mail accounts like email@example.com.
The problem is that Outlook 2016/365 wont Allow the extra acount but says something like “we appoligize but another user already logged into the organisation from this computer”
What Can I do to accomplish this?