diff --git a/docs/discovery-app/releases/manifests/preview.json b/docs/discovery-app/releases/manifests/preview.json
index 96f2dd87..ffc32331 100644
--- a/docs/discovery-app/releases/manifests/preview.json
+++ b/docs/discovery-app/releases/manifests/preview.json
@@ -1,27 +1,27 @@
 {
   "ring": "preview",
-  "latestVersion": "0.15.20",
-  "minimumVersion": "0.15.17",
+  "latestVersion": "0.15.21",
+  "minimumVersion": "0.15.18",
   "schemaVersion": 1,
   "platforms": {
     "osx-arm64": {
-      "installerUrl": "https://aka.ms/discovery/download/osx/current",
-      "sha256": "53b53e6847018b2ca4221d1bd4a7a863bf3644413b1ae8a54132bb08cd7bcd56"
+      "installerUrl": "https://aka.ms/discovery/download/preview/osx/current",
+      "sha256": "f192be200fc7aad7c4840b767716aa519917f57a78457cb19f03d56154c27a43"
     },
     "rhel-x64": {
-      "installerUrl": "PLACEHOLDER_PENDING_PUBLISH",
-      "sha256": "44020ffba550e0ad25430f092dcc599ba521f3b8d9240cd5c5a06f2a9eacc112"
+      "installerUrl": "https://aka.ms/discovery/download/preview/rhel/current",
+      "sha256": "860b444d74fe8965282328642351e1e819fee740fb56c0432bee18ce21403b70"
     },
     "win-arm64": {
-      "installerUrl": "https://aka.ms/discovery/download/arm64/current",
-      "sha256": "d33a4208005bd724d873fd3d07a1102ac02ffd357becece4dbbb95dda83dfad3"
+      "installerUrl": "https://aka.ms/discovery/download/preview/arm64/current",
+      "sha256": "27e9dd91f246a879ca9ea20f4d0907e1d1d63784f82fe65445cecf93f8065f8e"
     },
     "win-x64": {
-      "installerUrl": "https://aka.ms/discovery/download/current",
-      "sha256": "5f4b3b55c405c8411f0a8a8b005dfcc198650171dcbbb054200a1de878d0daf7"
+      "installerUrl": "https://aka.ms/discovery/download/preview/x64/current",
+      "sha256": "5387b86f1a372885573ee1006ab05e4441de4bb9ced8a10044cd8e4751770c6a"
     }
   },
   "releaseNotesUrl": "",
   "releaseNotesSummary": "",
-  "releasedAt": "2026-10-19T18:21:58Z"
+  "releasedAt": "2026-10-28T05:23:37Z"
 }
\ No newline at end of file