Recommended: 16 GB Based on an estimate of growth of 33%, 16 GB would be a reasonable amount of RAM to put in a physical server. In a virtual machine, given the ease with which settings can be modified and RAM can be added to the VM, starting at 12 GB with the plan to monitor and upgrade in the future is reasonable.

What Do You Need to Install Active Directory?

• An NTFS partition with enough free space.
• An Administrator’s username and password.
• The correct operating system version.
• A NIC.
• Properly configured TCP/IP (IP address, subnet mask and – optional – default gateway)

On 14 January 2020, Microsoft ended support for Microsoft Windows Server 2008 and Windows Server 2008 R2. As such, organisations no longer receive patches for security vulnerabilities identified in these products.

Recommended: 16 GB Based on an estimate of growth of 33%, 16 GB would be a reasonable amount of RAM to put in a physical server.

Active Directory Domain Service installation prerequisites

• 1.4 GHz 64-bit processor.
• 2 GB RAM.
• Storage adapter which supports PCI Express architecture (Windows Server 2016 does not support IDE/ATA/PATA/EIDE for boot and data)
• 32 GB of free space.
• 1 x network adapter.
• DVD drive or support for network, USB boot.

RAM. 2 Gb for Core installation; 4 Gb for Server with Desktop Experience installation option.

AD DS requirements 1 All user account domains and the domain to which the AD FS servers are joined must be operating at the domain functional… 2 A Windows Server 2008 domain functional level or higher is required for client certificate authentication if the… More

However, Windows Server 2008 domain functional level or higher is required for client certificate authentication to operate successfully if the certificate is explicitly mapped to a user’s account in AD DS. AD FS does not require schema changes or functional-level modifications to AD DS.

The process of installing an Active Directory domain in Windows Server 2008 is quite simple, but some beginners or IT professionals that have never had a chance to get their hands on AD installations and that are not familiar with its requirements might stumble across a few pitfalls.

New installations of AD FS 2016 require the Active Directory 2016 schema (minimum version 85). Raising the AD FS farm behavior level (FBL) to the 2016 level requires the Active Directory 2016 schema (minimum version 85). Any standard domain account can be used as a service account for AD FS.