# Unshared State

When configuring a fault tolerant pair that does not share state, you must ensure that both servers use identical configurations.

This is especially important for these configuration settings:

- Destinations
    Both servers must support the same destinations.
- Routes
    Messages must be able to arrive at the endpoints, using equivalent or identical routes across servers.
- Access Control
    Access control must be setup identically in both servers, so that the users.conf, groups.conf, and acl.conf file settings match.
- SSL
    When SSL is deployed, both servers must use the same certificate(s).

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