Augment PowerApps List with data from Office 365 Users Directory

[lionelmiller]

Hello,
I'm building a directory for a subset of our company's employees. 
Some information about these users - such as name - are on a PowerApps list. Now I would like to add more column which will contain values extracted from the Office 365 account of these employees. How can I do that? 
- By creating a flow? 

- By using a lookup type of column?

I do not want to use the Office 365 connector directly on the canvas for policy and security reasons. There should be no possibility to edit the 365 data, only read them.

Thanks in advance