c# - 确定 AD 安全组的电子邮件地址

Question

在工作中的 AD 中，我们有一些启用邮件的安全组。我正在使用 System.DirectoryServices.AccountManagement 命名空间，如下所示：

        List<GroupPrincipal> result = new List<GroupPrincipal>();            
        using (PrincipalContext domain = new PrincipalContext(ContextType.Domain, userinfo[0]))
        using (UserPrincipal user = UserPrincipal.FindByIdentity(domain, username))
        {

            if (user != null)
            {
                PrincipalSearchResult<Principal> groups = user.GetAuthorizationGroups();

                int totalGroupCounter = 0;
                StringBuilder output = new StringBuilder();
                List<GroupPrincipal> securityGroups = new List<GroupPrincipal>();
                List<GroupPrincipal> distributionGroups = new List<GroupPrincipal>();

                foreach (Principal group in groups)
                {
                    totalGroupCounter++;

                    if (((GroupPrincipal)group).IsSecurityGroup.Value)                        
                        securityGroups.Add((GroupPrincipal)group);                        
                    else                        
                        distributionGroups.Add((GroupPrincipal)group);                        
                }                
            }
        }

有了这些信息，找到群组电子邮件地址的正确方法是什么？

Answer 1

AccountManagement 库限制了您可以访问的属性。如果要获取组的电子邮件属性，则需要将其转换回DirectoryEntry对象。

PropertyValueCollection email = ((DirectoryEntry)group.GetUnderlyingObject()).Properties["mail"];
if (email.Value != null)
{
    // Do something with email property
}

Answer 2

I consider marc_s an expert on active directory topics, but, I too had a security group that had an e-mail address associated with it. Here is how I was able to fetch the e-mail from it:

private void GetGroupEmail() {
    using (var searcher = new DirectorySearcher()) {
        searcher.Filter = "(&(objectClass=group))";
        searcher.SearchRoot = entry;
        searcher.PropertiesToLoad.Add("mail");

        foreach (SearchResult sr in searcher.FindAll()) {
            var email = GetSearchResultProperty(sr, "mail");
        }
    }
}

private string GetSearchResultProperty(SearchResult sr, string propertyName) {
    var property = sr.Properties[propertyName];

    if (property != null && property.Count > 0) {
        return (string)property[0];
    } else {
        return null;
    }
}

Answer 3

测试启用邮件的组的最安全方法是读取 proxyAddresses 并测试任何以“smtp:”开头的条目。仅测试电子邮件字段是不够的。像这样扩展 GroupPrincipal

public bool IsMailEnabled
        {
            get
            {
                var proxyAddresses = ExtensionGet("proxyAddresses");
                if (proxyAddresses == null)
                    return false;

                if (proxyAddresses.Length == 0)
                    return false;

                try
                {
                    List<string> proxyAddressesStringList = proxyAddresses.Cast<string>().ToList();
                    if (proxyAddressesStringList.Where(x => x.StartsWith("smtp:", StringComparison.InvariantCultureIgnoreCase)).Count() > 0)
                        return true;
                    else
                        return false;
                }
                catch
                {
                    return false;
                }
            }
        }