# Can not modify my fleet server and agent configuration on ECK

**URL:** https://discuss.elastic.co/t/can-not-modify-my-fleet-server-and-agent-configuration-on-eck/384265
**Category:** Beats
**Tags:** fleet
**Created:** [December 26, 2025, 1:50pm UTC](https://discuss.elastic.co/t/can-not-modify-my-fleet-server-and-agent-configuration-on-eck/384265 "2025-12-26T13:50:24Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![stephenb](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/stephenb/32/40856_2.png) [@stephenb](https://discuss.elastic.co/u/stephenb)
#### Post date: [December 28, 2025, 7:42am UTC](https://discuss.elastic.co/t/can-not-modify-my-fleet-server-and-agent-configuration-on-eck/384265/6 "2025-12-28T07:42:10Z")

</div>

After you have the fleet server loaded

Go the

Kibana - Fleet - settings

And check the Fleet and Elasticsearch hosts:ports and make sure they are correct, they get pulled down by the policies.

See

> [@Breaking changes between elastic agent 8.16.1 and 8.16.3](https://discuss.elastic.co/t/breaking-changes-between-elastic-agent-8-16-1-and-8-16-3/374219/8):
>
> Check the default elasticseadch output Fleet \> settings Then check the actual policy to make sure it is using the correct output when you use enrollment those are what are used

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_[View the full topic](https://discuss.elastic.co/t/can-not-modify-my-fleet-server-and-agent-configuration-on-eck/384265)._