How to Identify Users Who Have Connected Outlook via Einstein Activity Capture (EAC)?

Hi Everyone,   

We are using Einstein Activity Capture (EAC) in Salesforce,  users authenticate their Outlook accounts  from Salesforce.   

I’m trying to identify which users have successfully connected/authenticated their Outlook. The goal is to build a report for users who have their Outlook connected.   

I’ve explored a few options (including standard objects and APIs), but haven’t been able to find a reliable way to retrieve user-level connection status.   

Has anyone implemented a solution for this?

•  Is there any SOQL query or API that exposes this information? 
•  If not, what’s the best alternative approach to track/report on this? 

Any guidance or best practices would be really helpful.   

Thanks in advance!