SharePoint Online - Hide External Users from Global Search Results
Had a problem where external users (people outside our organisation who had been provided with an anonymous link to OneDrive/SharePoint Documents) were showing up in SharePoint's People Search Results. This article explains how to fix: https://englando.wordpress.com/2015/07/24/hiding-users-from-office-365-sharepoint-global-search-results/ Basically you need to add a Query Rule to SharePoint's 'Local People Results' Search Query to block out results that contain the external users. I personally filtered out all results where a persons Username contained ' #EXT#' , which is what gets appended in Office 365 whenever an external user is given access to a document.