# Documentation **URL:** https://community.letsencrypt.org/c/docs/15.md [Latest](https://community.letsencrypt.org/latest.md) · [Categories](https://community.letsencrypt.org/categories.md) · [Tags](https://community.letsencrypt.org/tags.md) --- ## [About the Documentation category](https://community.letsencrypt.org/t/about-the-documentation-category/6751)
**Author:** [@josh](https://community.letsencrypt.org/u/josh)\ **Replies:** 0\ **Last updated:** [December 11, 2015, 10:05pm UTC](https://community.letsencrypt.org/t/about-the-documentation-category/6751 "2015-12-11T22:05:59Z")
This category is for documentation about various aspects of Let's Encrypt's software and services. More documentation can also be found at https://letsencrypt.org/docs/. All documentation made available here is license… --- ## [Wording of HTTP-01 Challenge Documentation for IP SANs](https://community.letsencrypt.org/t/wording-of-http-01-challenge-documentation-for-ip-sans/243594)
**Author:** [@griffin](https://community.letsencrypt.org/u/griffin)\ **Replies:** 2\ **Last updated:** [December 4, 2025, 2:00am UTC](https://community.letsencrypt.org/t/wording-of-http-01-challenge-documentation-for-ip-sans/243594 "2025-12-04T02:00:51Z")
Is this going to pose a problem for IP SANs? Our implementation of the HTTP-01 challenge follows redirects, up to 10 redirects deep. It only accepts redirects to “http:” or “https:”, and only to ports 80 or 443. It doe… --- ## [Staging Root/Intermediates saying "(STAGING)" in subject](https://community.letsencrypt.org/t/staging-root-intermediates-saying-staging-in-subject/243320)
**Author:** [@petercooperjr](https://community.letsencrypt.org/u/petercooperjr)\ **Replies:** 2\ **Last updated:** [November 25, 2025, 8:53pm UTC](https://community.letsencrypt.org/t/staging-root-intermediates-saying-staging-in-subject/243320 "2025-11-25T20:53:24Z")
Just another post of me being curious and nitpicky. The prior generations of staging roots and intermediates say (STAGING) in both the O= and CN= fields of the subject. C = US, O = (STAGING) Internet Security Research … --- ## [Adjustments to the Let's Encrypt Statistics methodology](https://community.letsencrypt.org/t/adjustments-to-the-lets-encrypt-statistics-methodology/37866)
**Author:** [@jcjones](https://community.letsencrypt.org/u/jcjones)\ **Replies:** 0\ **Last updated:** [July 10, 2017, 8:54pm UTC](https://community.letsencrypt.org/t/adjustments-to-the-lets-encrypt-statistics-methodology/37866 "2017-07-10T20:54:39Z")
We're changing the methodology used to calculate the Let's Encrypt Statistics page, primarily to better cope with the growth of Let's Encrypt. Over the past several months it's become clear that the existing methodology … --- ## [A note on recent Plesk problems](https://community.letsencrypt.org/t/a-note-on-recent-plesk-problems/35594)
**Author:** [@schoen](https://community.letsencrypt.org/u/schoen)\ **Replies:** 0\ **Last updated:** [June 6, 2017, 1:52am UTC](https://community.letsencrypt.org/t/a-note-on-recent-plesk-problems/35594 "2017-06-06T01:52:24Z")
We've been getting a number of inquiries on this forum from Plesk users who are having trouble getting certificates using Plesk's Let's Encrypt support. If Let's Encrypt was previously working for you until May to June… --- ## [Rate Limits for Let's Encrypt](https://community.letsencrypt.org/t/rate-limits-for-lets-encrypt/6769)
**Author:** [@josh](https://community.letsencrypt.org/u/josh)\ **Replies:** 1\ **Last updated:** [March 26, 2016, 2:31am UTC](https://community.letsencrypt.org/t/rate-limits-for-lets-encrypt/6769 "2016-03-26T02:31:18Z")
This page has moved (as of July 2016) to https://letsencrypt.org/docs/rate-limits/. --- ## [Integration Guide](https://community.letsencrypt.org/t/integration-guide/13123)
**Author:** [@jsha](https://community.letsencrypt.org/u/jsha)\ **Replies:** 0\ **Last updated:** [March 24, 2016, 8:59pm UTC](https://community.letsencrypt.org/t/integration-guide/13123 "2016-03-24T20:59:35Z")
This page has moved to https://letsencrypt.org/docs/integration-guide/. --- ## [Testing Against the Let's Encrypt Staging Environment](https://community.letsencrypt.org/t/testing-against-the-lets-encrypt-staging-environment/6763)
**Author:** [@josh](https://community.letsencrypt.org/u/josh)\ **Replies:** 0\ **Last updated:** [December 12, 2015, 12:42am UTC](https://community.letsencrypt.org/t/testing-against-the-lets-encrypt-staging-environment/6763 "2015-12-12T00:42:58Z")
This page has moved to https://letsencrypt.org/docs/staging-environment/. --- ## [Upcoming intermediate changes](https://community.letsencrypt.org/t/upcoming-intermediate-changes/13106)
**Author:** [@jsha](https://community.letsencrypt.org/u/jsha)\ **Replies:** 3\ **Last updated:** [March 25, 2016, 10:04pm UTC](https://community.letsencrypt.org/t/upcoming-intermediate-changes/13106 "2016-03-25T22:04:22Z")
We've been working on fixing Windows XP support for Let's Encrypt certificates. We've got new intermediates issued from IdenTrust that we'll be testing out today and rolling out if everything is good. We're also rolling … --- ## [Expiration Emails (Too Many, Unnecessary, etc.)](https://community.letsencrypt.org/t/expiration-emails-too-many-unnecessary-etc/9502)
**Author:** [@jcjones](https://community.letsencrypt.org/u/jcjones)\ **Replies:** 1\ **Last updated:** [March 17, 2016, 6:37pm UTC](https://community.letsencrypt.org/t/expiration-emails-too-many-unnecessary-etc/9502 "2016-03-17T18:37:08Z")
\[Update March 17 2016: Email is better now. See below\] If you provide an email address to Let's Encrypt when you create your account, we'll send you expiry notices when your certificate is coming up for renewal. Our … --- ## [Let's Encrypt Client Documentation](https://community.letsencrypt.org/t/lets-encrypt-client-documentation/7026)
**Author:** [@josh](https://community.letsencrypt.org/u/josh)\ **Replies:** 0\ **Last updated:** [December 14, 2015, 11:14pm UTC](https://community.letsencrypt.org/t/lets-encrypt-client-documentation/7026 "2015-12-14T23:14:38Z")
Documentation for the Let's Encrypt client can be found here: https://letsencrypt.readthedocs.org/en/latest/ --- ## [Frequently Asked Questions (FAQ)](https://community.letsencrypt.org/t/frequently-asked-questions-faq/26)
**Author:** [@josh](https://community.letsencrypt.org/u/josh)\ **Replies:** 0\ **Last updated:** [August 13, 2015, 4:42am UTC](https://community.letsencrypt.org/t/frequently-asked-questions-faq/26 "2015-08-13T04:42:58Z")
Please see https://letsencrypt.org/docs/faq/ for Frequently Asked Questions about Let’s Encrypt.