To install Remote Server Administration Tools in windows server Active Directory Users and Computers:
Open Server Manager -> Add roles and features -> selected Go to “Remote Serer Administration Tools” and expand it – > Select “AD DS and AD LDS Tools -> click install and follow the wizard.
To install Remote Server Administration Tools in windows 10:
Log in to Windows 10 with an administrator account.
Type in the search Apps and features and select it -> click Manage optional features.-> Add a feature – > select from the list the appropriate RSAT -> click install.
Note: if you cannot find the remote server administration tool in the list then you need to download it from Microsoft website: http://www.microsoft.com/en-us/download/confirmation.aspx?id=45520