How to check if user has sent emails or onedrive links?

[Sam240]

Is there an easy way to check if a user sent emails to external emails or shared onedrive links via email or check for any shady activity? We'd like to make sure that a user who's no longer with the company, didn't share any of the company info with anyone.

Thank you

[#2]

@Sam240 

You may start by below and consider e-discovery and message trace to detail:

https://learn.microsoft.com/en-us/microsoft-365/admin/activity-reports/active-users-ww?view=o365-wor...