---
title: "Domain Controller Round Robin"
slug: "domain-controller-round-robin"
updated: 2023-03-24T17:20:58Z
published: 2023-03-24T17:20:58Z
canonical: "healthcare.rapididentity.com/domain-controller-round-robin"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://healthcare.rapididentity.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Domain Controller Round Robin

## Domain Controller Round Robin

ExactAccess will use all of the domain controllers returned by the domain in a round robin fashion to spread the work load across multiple servers. To exclude a particular domain from being contacted, you must add it to the ExcludeDCs list.

          TIP

          

It is recommended to exclude any domain controller that is not on the local sub-net (such as DCs that are located across a WAN link) so that a slow link does not impact performance.

Under the configured domain registry key, add a comma separated list of DC names to exclude.

Example: the DCs for XAENG are: dc01, dc02, and wandc01

```
HKEY_LOCAL_MACHINE\SOFTWARE\HealthCast\ExactAccess\XADSNT\Servers\XAENG

ExcludedDCs:reg_sz="wandc01"
```

This will exclude the wandc01 domain controller from being contacted by the XA server for user and role lookup operations.