# Fleet-server FAILED Error - x509 : certificate signed by unknown authority

**URL:** <https://discuss.elastic.co/t/fleet-server-failed-error-x509-certificate-signed-by-unknown-authority/382673>\
**Category:** Elastic Agent\
**Created:** [October 14, 2025, 7:49am UTC](https://discuss.elastic.co/t/fleet-server-failed-error-x509-certificate-signed-by-unknown-authority/382673 "2025-10-14T07:49:09Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Mauro\_929292](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mauro_929292/32/122338_2.png) [@Mauro\_929292](https://discuss.elastic.co/u/Mauro_929292)\
**Post date:** [October 14, 2025, 7:49am UTC](https://discuss.elastic.co/t/fleet-server-failed-error-x509-certificate-signed-by-unknown-authority/382673/1 "2025-10-14T07:49:09Z")

</div>

```auto
I'm having a problem with fleet-server on elastic-agent. My certificate has expired, but I can't figure out where to update the new certificates I created, which are trusted by a domain CA. Can you help me??

```