# ACME Challenge Multiple Domains?

**URL:** <https://community.letsencrypt.org/t/acme-challenge-multiple-domains/108568>\
**Category:** Help\
**Created:** [December 13, 2019, 5:33pm UTC](https://community.letsencrypt.org/t/acme-challenge-multiple-domains/108568 "2019-12-13T17:33:09Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![JuergenAuer](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/juergenauer/32/26491_2.png) [@JuergenAuer](https://community.letsencrypt.org/u/JuergenAuer)\
**Post date:** [December 13, 2019, 5:37pm UTC](https://community.letsencrypt.org/t/acme-challenge-multiple-domains/108568/2 "2019-12-13T17:37:45Z")

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Hi @dbeck

> [@dbeck](#):
>
> Failed to receive the challenge. Method not allowed

there is a change of the Letsencrypt API. GET -\> POST.

> [@ACME breaking change: Most GETs become POSTs](https://community.letsencrypt.org/t/acme-breaking-change-most-gets-become-posts/71025):
>
> U…

So using GET if a POST is required -\> that's the error message "Method not allowed".

Looks like your client is too old. So first step: Update your client.

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_[View the full topic](https://community.letsencrypt.org/t/acme-challenge-multiple-domains/108568)._