This content is part of a third party extension that is not supported by the Cake project. For more information about this extension see Cake.ActiveDirectory.

public static string FindUserPrincipalNameByProperty(this ICakeContext context, string propertyName, string propertyValue, UserSettings settings)

var upn = FindUserPrincipalNameByProperty("proxyAddresses", "jdoe@example.com", new UserSettings { 
    LoginName = "domainAdmin", 
    Password = "adminPassword", 
    DomainName = "Cake.net" });