The availability of Active Directory Domain Service (AD DS) depends on the specific environment and configuration. If AD DS is not available, it could be due to various reasons such as network connectivity issues, server downtime, or configuration errors. It is important to troubleshoot the specific issue and address any underlying problems to ensure the availability of AD DS for the organization's users and systems. Regular monitoring and maintenance of AD DS can help prevent and resolve availability issues. **

The Active Directory Domain Service can be enabled or installed on a Windows Server by using the Server Manager. In the Server Manager, navigate to the "Add roles and features" option and select "Active Directory Domain Services" from the list of available roles. Follow the installation wizard to complete the installation process, which includes configuring the domain and promoting the server to a domain controller. Additionally, the Active Directory Domain Service can also be installed using PowerShell by running the Install-WindowsFeature cmdlet with the appropriate parameters. **

The Active Directory Domain Service can be activated or installed by first installing the Active Directory Domain Services role on a Windows Server. This can be done through the Server Manager by selecting the 'Add roles and features' option. Once the role is installed, the Active Directory Domain Service can be configured by running the Active Directory Domain Services Configuration Wizard. This wizard will guide you through the process of setting up the domain, creating users, and managing permissions within the Active Directory. **

One way to create Active Directory without having your own server is to use a cloud-based service such as Microsoft Azure Active Directory. Azure AD allows you to create and manage users, groups, and applications in the cloud without the need for on-premises servers. You can also use a third-party hosting provider that offers Active Directory as a service, allowing you to set up and manage your directory without the need for physical server infrastructure. Additionally, some virtualization platforms, such as VMware and Hyper-V, allow you to create virtual servers that can host Active Directory services without the need for dedicated hardware. **

To set up a domain with Active Directory in your home network, you will first need a server running Windows Server operating system. Install the Active Directory Domain Services role on the server and promote it to a domain controller. Configure the domain name and set up user accounts and permissions. Finally, join your client devices to the domain to start managing them through Active Directory. **

Active Directory in Windows Server 2012 offers several advantages, such as centralized management of user accounts, group policies, and resources, which simplifies administration and enhances security. It also provides a single sign-on feature, allowing users to access multiple resources with a single set of credentials. Additionally, Active Directory enables scalability and flexibility, making it suitable for both small and large organizations. However, there are also some disadvantages to consider. Active Directory can be complex to set up and maintain, requiring specialized knowledge and training. It also introduces a single point of failure, meaning that if the Active Directory server goes down, it can disrupt access to resources for all users. Additionally, implementing and managing Active Directory can be resource-intensive, requiring dedicated hardware and regular maintenance. **

Active Directory does not work on the Synology DiskStation because the DiskStation runs on a Linux-based operating system, while Active Directory is a Microsoft technology designed to run on Windows Server. Active Directory requires specific Windows Server features and functionalities that are not present in the Linux environment of the DiskStation. As a result, the two systems are not compatible for running Active Directory services. **

To output users filtered in Active Directory, you can use PowerShell commands to query and filter the users based on specific criteria such as department, title, or any other attribute. You can use the `Get-ADUser` cmdlet with filters like `-Filter` or `-LDAPFilter` to retrieve the desired user information. Additionally, you can combine filters using logical operators like `-and` or `-or` to further refine your search results. Finally, you can output the filtered users to a CSV file or display them directly in the PowerShell console for further analysis or processing. **