Us a Aha user I want to search users by email address to find user with has different language signs in Name/Surname

When you try search or mention user by Name or Surname you can't search user with foreign language signs in name/surname (user can't add all different keyboard). When users data are taken from domain linked account you can't change the name/surname in Aha too. 

Please give possibility to search user by email address. In e-mail address always we have English signs. If user name is Łukasz Źrebełko you can find him as lzre... with easy.