docs: update authd availability for Ubuntu 26.04 LTS archive

Author: nooreldeenmansour

SECURITY.md

@@ -2,10 +2,17 @@
 
 ## Supported Versions
 
-`authd` is currently released to a PPA. There are two PPAs, [stable](https://launchpad.net/~ubuntu-enterprise-desktop/+archive/ubuntu/authd) and [edge](https://launchpad.net/~ubuntu-enterprise-desktop/+archive/ubuntu/authd-edge)
-We provide security updates for the following versions of `authd`. Please ensure you are using a supported version to receive updates and patches.
+We provide security updates for the latest version of `authd` on each supported Ubuntu LTS release.
 
-If you are unsure of your version, please run the following command in a terminal and check which PPA `authd` is installed from:
+**Ubuntu 26.04 LTS (Resolute) and later:** `authd` is available directly from the Ubuntu archive.
+
+**Ubuntu 24.04 LTS (Noble) and earlier supported LTS releases:** `authd` is not in the Ubuntu archive and must be installed via the stable PPA.
+
+See [Install authd](https://documentation.ubuntu.com/authd/stable-docs/howto/install-authd/) for installation instructions.
+
+An [edge PPA](https://launchpad.net/~ubuntu-enterprise-desktop/+archive/ubuntu/authd-edge) provides the latest development builds, but is not recommended for production use and does not receive security support.
+
+If you are unsure of your version, please run the following command in a terminal and check which channel `authd` is installed from:
 
 ```shell
 apt policy authd

docs/howto/install-authd.md

@@ -15,26 +15,20 @@ authd is delivered as a Debian package for Ubuntu Desktop and Ubuntu Server.
 
 ## System requirements
 
-* Distribution: Ubuntu Desktop 24.04 LTS or Ubuntu Server 24.04 LTS
+* Distribution: Ubuntu Desktop 24.04 LTS or later, or Ubuntu Server 24.04 LTS or later
 * Architectures: amd64, arm64
 
 ## Install authd
 
-You can install authd from the [stable PPA](https://launchpad.net/~ubuntu-enterprise-desktop/+archive/ubuntu/authd).
+**Ubuntu 26.04 LTS (Resolute) and later:** `authd` is available directly from the Ubuntu archive.
 
-To add this PPA to your system's software sources, run the following command:
+**Ubuntu 24.04 LTS (Noble):** `authd` must be installed from the [stable PPA](https://launchpad.net/~ubuntu-enterprise-desktop/+archive/ubuntu/authd):
 
 ```shell
 sudo add-apt-repository ppa:ubuntu-enterprise-desktop/authd
 ```
 
-```{note}
-The stable PPA release of authd can be used today as an authentication service.
-This project is under active development and the release of authd to the
-official archive is planned for Ubuntu 26.04 LTS.
-```
-
-Then install authd and any additional Debian packages needed for your system of
+Install authd and any additional Debian packages needed for your system of
 choice:
 
 :::::{tab-set}

docs/reference/cloud-init-deploy.md

@@ -36,7 +36,14 @@ Define the necessary environmental variables:
 
 ## Install authd
 
-Add the authd PPA to the system's software sources and install authd:
+**Ubuntu 26.04 LTS (Resolute) and later:** `authd` is available directly from the Ubuntu archive:
+
+```yaml
+packages:
+  - authd
+```
+
+**Ubuntu 24.04 LTS (Noble):** `authd` must be installed from the stable PPA. Add it to the system's software sources:
 
 ```yaml
 apt:

docs/reference/landscape-deploy.md

@@ -34,14 +34,24 @@ CLIENT_ID=<CLIENT_ID>
 
 Install the authd deb and the broker snap:
 
+:::{note}
+On Ubuntu 24.04 LTS (Noble), `authd` is not in the Ubuntu archive. Add the following
+line at the start of your script, before `apt-get install authd`:
+
+```shell
+add-apt-repository -y ppa:ubuntu-enterprise-desktop/authd
+```
+
+On Ubuntu 26.04 LTS (Resolute) and later, this step is not required.
+:::
+
 :::::{tab-set}
 :sync-group: broker
 
 ::::{tab-item} Google IAM
 :sync: google
 
 ```shell
-add-apt-repository -y ppa:ubuntu-enterprise-desktop/authd
 apt-get upgrade -y
 apt-get install -y authd
 snap install authd-google
@@ -53,7 +63,6 @@ snap install authd-google
 :sync: msentraid
 
 ```shell
-add-apt-repository -y ppa:ubuntu-enterprise-desktop/authd
 apt-get upgrade -y
 apt-get install -y authd
 snap install authd-msentraid