Check Email Exists In Active Directory Using C#
Good afternoon gents! Here's a method on checking if an email exists in an Active Directory Domain given the format of an email FirstName.LastName@yourcompanyname.com . If the format of your company email is different from the one presented, just change the logic of the code to extract the family name. /* Email Format: Gregory.Esguerra@abcbusiness.com */ private bool CheckIfEmailExistsInDomain ( string email) { string searchName = string .Empty; searchName = email.Substring(email.IndexOf( '.' ) + 1 , (email.IndexOf( '@' )- 1 ) - email.IndexOf( '.' )); using ( var context = new PrincipalContext(ContextType.Domain, "abcbusiness.corp" )) { using ( var searcher = new PrincipalSearcher( new UserPrincipal(context))) { PrincipalSearchResult<Principal> allPrincipal = searcher.FindAll(); List<Principal> principalObjects = allPrincipal.Where(t => t.Name.Contains(ToUpperFirstLetter(searchName))).ToList(); if ...