Add missing $FLEET_VAR_SCEP_RENEWAL_ID to Okta Platform SSO guide (#42847)

The SCEP profile for NDES certificate authority requires the
$FLEET_VAR_SCEP_RENEWAL_ID variable in the Subject OU field. Without
this, GitOps runs fail with an error about missing variables.

https://claude.ai/code/session_01DW2rrUmrxsTaD3t5J66Xz4

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**Related issue:** Resolves #

# Checklist for submitter

If some of the following don't apply, delete the relevant line.

- [ ] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.

- [ ] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements), JS
inline code is prevented especially for url redirects, and untrusted
data interpolated into shell scripts/commands is validated against shell
metacharacters.
- [ ] If paths of existing endpoints are modified without backwards
compatibility, checked the frontend/CLI for any necessary changes

## Testing

- [ ] Added/updated automated tests
- [ ] Where appropriate, [automated tests simulate multiple hosts and
test for host
isolation](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/reference/patterns-backend.md#unit-testing)
(updates to one hosts's records do not affect another)

- [ ] QA'd all new/changed functionality manually

For unreleased bug fixes in a release candidate, one of:

- [ ] Confirmed that the fix is not expected to adversely impact load
test results
- [ ] Alerted the release DRI if additional load testing is needed

## Database migrations

- [ ] Checked schema for all modified table for columns that will
auto-update timestamps during migration.
- [ ] Confirmed that updating the timestamps is acceptable, and will not
cause unwanted side effects.
- [ ] Ensured the correct collation is explicitly set for character
columns (`COLLATE utf8mb4_unicode_ci`).

## New Fleet configuration settings

- [ ] Setting(s) is/are explicitly excluded from GitOps

If you didn't check the box above, follow this checklist for
GitOps-enabled settings:

- [ ] Verified that the setting is exported via `fleetctl
generate-gitops`
- [ ] Verified the setting is documented in a separate PR to [the GitOps
documentation](https://github.com/fleetdm/fleet/blob/main/docs/Configuration/yaml-files.md#L485)
- [ ] Verified that the setting is cleared on the server if it is not
supplied in a YAML file (or that it is documented as being optional)
- [ ] Verified that any relevant UI is disabled when GitOps mode is
enabled

## fleetd/orbit/Fleet Desktop

- [ ] Verified compatibility with the latest released version of Fleet
(see [Must
rule](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/workflows/fleetd-development-and-release-strategy.md))
- [ ] If the change applies to only one platform, confirmed that
`runtime.GOOS` is used as needed to isolate changes
- [ ] Verified that fleetd runs on macOS, Linux and Windows
- [ ] Verified auto-update works from the released version of component
to the new version (see [tools/tuf/test](../tools/tuf/test/README.md))

Co-authored-by: Claude <noreply@anthropic.com>

articles/deploying-okta-platform-sso-with-fleet.md

@@ -98,13 +98,32 @@ Open [iMazing Profile Editor](https://imazing.com/profile-editor), create a new
 - **URL:** `$FLEET_VAR_NDES_SCEP_PROXY_URL`
 - **Challenge:** `$FLEET_VAR_NDES_SCEP_CHALLENGE`
 - **Subject:** `CN=managementAttestation %HardwareUUID%`
+- **Subject Alt Names:** Add an OU field with value `$FLEET_VAR_SCEP_RENEWAL_ID`
 - **Key Size:** 2048
 - **Key Usage:** Signing
 - **Key is Extractable:** Unchecked
 - **Allow All Apps Access:** Checked
 - **Certificate Expiration Notification:** Set to 14 days before expiration
 
-Fleet replaces `$FLEET_VAR_NDES_SCEP_PROXY_URL` and `$FLEET_VAR_NDES_SCEP_CHALLENGE` with fresh values each time the profile is delivered to a host. Each host receives a unique, short-lived challenge rather than a shared static secret.
+**Important:** The Subject must include both the CN and an OU field with `$FLEET_VAR_SCEP_RENEWAL_ID`. In raw XML, the Subject array should look like this:
+
+```xml
+<key>Subject</key>
+<array>
+    <array>
+        <array>
+            <string>CN</string>
+            <string>managementAttestation %HardwareUUID%</string>
+        </array>
+        <array>
+            <string>OU</string>
+            <string>$FLEET_VAR_SCEP_RENEWAL_ID</string>
+        </array>
+    </array>
+</array>
+```
+
+Fleet replaces `$FLEET_VAR_NDES_SCEP_PROXY_URL`, `$FLEET_VAR_NDES_SCEP_CHALLENGE`, and `$FLEET_VAR_SCEP_RENEWAL_ID` with the appropriate values each time the profile is delivered to a host. Each host receives a unique, short-lived challenge rather than a shared static secret.
 
 **Important:** Okta doesn't support automatic certificate renewal. You must redeploy the profile before the certificate expires to replace it. Use the osquery policy below to identify hosts with certificates expiring within 14 days.
 

docs/solutions/macos/configuration-profiles/okta-device-access-scep-dynamic-example.mobileconfig

@@ -24,6 +24,10 @@
 							<string>CN</string>
 							<string>managementAttestation %HardwareUUID%</string>
 						</array>
+						<array>
+							<string>OU</string>
+							<string>$FLEET_VAR_SCEP_RENEWAL_ID</string>
+						</array>
 					</array>
 				</array>
 				<key>URL</key>