How To Create Alert when 'Grant Permissions' is Performed on a OneDrive User

Hopefully someone can help with this.
Our business has a process that a OneDrive/Sharepoint administrator will grant a users manager access to the departed employees' OneDrive account when the user leaves the organization.

I am looking for a way to automatically generate an alert that goes to our security notifications distribution list when this sort of action occurs. Granting one user access to another user's OneDrive/SharePoint files could be a huge security risk. I want to make sure any time …

alert cybersecurity grant onedrive permissions