Use these instructions when expect to have large numbers of single sign-on (SSO) users for AD Connect, and you want to use Microsoft® Network Load Balancing (NLB) as the load-balancing and clustering solution. NLB is an optional Windows Server feature.
Note: If you're using a load-balancing and clustering solution other than NLB, you can also
apply these settings to your configuration by replacing the NLB-specific steps for those
that match your solution.
You will configure NLB clustering for AD Connect, using the example configuration shown in the illustration as a guideline.
Although you can use this process for other configurations, these instructions are for a minimal configuration, one Active Directory domain controller (DC) and two Windows Server IIS hosts.
Note: The IIS hosts need two NICs, one for the static IP used by NLB (NLB requires static
IPs), the other for the dynamic IP used by the DC. The NLB-dedicated NICs for all IIS
hosts should be in the same subnet.