diff --git a/x-pack/plugins/fleet/server/services/agents/helpers.test.ts b/x-pack/plugins/fleet/server/services/agents/helpers.test.ts
index 8e13c3bfe6a28..da4a343d9e142 100644
--- a/x-pack/plugins/fleet/server/services/agents/helpers.test.ts
+++ b/x-pack/plugins/fleet/server/services/agents/helpers.test.ts
@@ -164,6 +164,162 @@ describe('searchHitToAgent', () => {
     });
   });
 
+  it('should work with DEGRADED last_checkin_status', () => {
+    const hit = {
+      _source: {
+        access_api_key_id: 'EH_RlIgBn_WkCEINY-qh',
+        active: true,
+        enrolled_at: '2023-06-07T07:45:30Z',
+        local_metadata: {
+          elastic: {
+            agent: {
+              'build.original':
+                '8.9.0-SNAPSHOT (build: 953fda060f317c2389ef6fd1cac8806a2bfe92ac at 2023-05-29 14:51:32 +0000 UTC)',
+            },
+          },
+        },
+        agent: {
+          id: '504b3006-52df-46a6-b7db-f3dc67aca7ac',
+          version: '8.9.0',
+        },
+        policy_id: '76c5b020-0486-11ee-97a3-c3856dd800f7',
+        type: 'PERMANENT',
+        outputs: {
+          '68233290-0486-11ee-97a3-c3856dd800f7': {
+            api_key: 'En_RlIgBn_WkCEINb-pQ:mfeV4ji6RNGyCOBs25gteg',
+            permissions_hash: '6ac9e595a2f8cba8893f9ea1fbfb6cba4b4d6f16d935c17a6368f11ee0b0a5d8',
+            type: 'elasticsearch',
+            api_key_id: 'En_RlIgBn_WkCEINb-pQ',
+            to_retire_api_key_ids: [
+              {
+                id: '1',
+                retired_at: '',
+              },
+            ],
+          },
+        },
+        policy_revision_idx: 2,
+        components: [
+          {
+            id: 'system/metrics-68233290-0486-11ee-97a3-c3856dd800f7',
+            units: [
+              {
+                id: 'system/metrics-68233290-0486-11ee-97a3-c3856dd800f7-system/metrics-system-03ac5d6e-4931-4ace-a034-5e25768db326',
+                type: 'input',
+                message: 'Healthy',
+                status: 'HEALTHY',
+                payload: {
+                  key: 'val',
+                },
+              },
+            ],
+            type: 'system/metrics',
+            message: "Healthy: communicating with pid '36'",
+            status: 'HEALTHY',
+          },
+        ],
+        last_checkin_message: 'Running',
+        last_checkin_status: 'DEGRADED',
+        last_checkin: '2023-06-07T08:39:03Z',
+        unenrolled_at: '2023-06-07T07:45:30Z',
+        unenrollment_started_at: '2023-06-07T07:45:30Z',
+        upgraded_at: '2023-06-07T07:45:30Z',
+        upgrade_started_at: '2023-06-07T07:45:30Z',
+        default_api_key_id: 'EH_RlIgBn_WkCEINY-qh',
+        packages: ['system'],
+        tags: ['agent'],
+        user_provided_metadata: {
+          key: 'val',
+        },
+        default_api_key_history: [
+          {
+            id: '1',
+            retired_at: '',
+          },
+        ],
+      },
+      sort: [1686123930000, 'beb13bf6a73e'],
+      fields: {
+        status: ['online'],
+      },
+      _id: '504b3006-52df-46a6-b7db-f3dc67aca7ac',
+    };
+    const agent = searchHitToAgent(hit as any);
+    expect(agent).toEqual({
+      id: '504b3006-52df-46a6-b7db-f3dc67aca7ac',
+      type: 'PERMANENT',
+      active: true,
+      enrolled_at: '2023-06-07T07:45:30Z',
+      access_api_key_id: 'EH_RlIgBn_WkCEINY-qh',
+      policy_id: '76c5b020-0486-11ee-97a3-c3856dd800f7',
+      last_checkin: '2023-06-07T08:39:03Z',
+      last_checkin_status: 'degraded',
+      last_checkin_message: 'Running',
+      policy_revision: 2,
+      sort: [1686123930000, 'beb13bf6a73e'],
+      outputs: {
+        '68233290-0486-11ee-97a3-c3856dd800f7': {
+          api_key_id: 'En_RlIgBn_WkCEINb-pQ',
+          type: 'elasticsearch',
+          to_retire_api_key_ids: [
+            {
+              id: '1',
+              retired_at: '',
+            },
+          ],
+        },
+      },
+      components: [
+        {
+          id: 'system/metrics-68233290-0486-11ee-97a3-c3856dd800f7',
+          type: 'system/metrics',
+          status: 'HEALTHY',
+          message: "Healthy: communicating with pid '36'",
+          units: [
+            {
+              id: 'system/metrics-68233290-0486-11ee-97a3-c3856dd800f7-system/metrics-system-03ac5d6e-4931-4ace-a034-5e25768db326',
+              type: 'input',
+              status: 'HEALTHY',
+              message: 'Healthy',
+              payload: {
+                key: 'val',
+              },
+            },
+          ],
+        },
+      ],
+      local_metadata: {
+        elastic: {
+          agent: {
+            'build.original':
+              '8.9.0-SNAPSHOT (build: 953fda060f317c2389ef6fd1cac8806a2bfe92ac at 2023-05-29 14:51:32 +0000 UTC)',
+          },
+        },
+      },
+      status: 'online',
+      unenrolled_at: '2023-06-07T07:45:30Z',
+      unenrollment_started_at: '2023-06-07T07:45:30Z',
+      upgraded_at: '2023-06-07T07:45:30Z',
+      upgrade_started_at: '2023-06-07T07:45:30Z',
+      default_api_key_id: 'EH_RlIgBn_WkCEINY-qh',
+      packages: ['system'],
+      tags: ['agent'],
+      user_provided_metadata: {
+        key: 'val',
+      },
+      default_api_key_history: [
+        {
+          id: '1',
+          retired_at: '',
+        },
+      ],
+      agent: {
+        id: '504b3006-52df-46a6-b7db-f3dc67aca7ac',
+        version: '8.9.0',
+      },
+    });
+  });
+
   it('should work when units is not present', () => {
     const hit = {
       _source: {
diff --git a/x-pack/plugins/fleet/server/services/agents/helpers.ts b/x-pack/plugins/fleet/server/services/agents/helpers.ts
index 7433fa441953d..4258e883b2351 100644
--- a/x-pack/plugins/fleet/server/services/agents/helpers.ts
+++ b/x-pack/plugins/fleet/server/services/agents/helpers.ts
@@ -72,7 +72,8 @@ export function searchHitToAgent(
     default_api_key_id: hit._source?.default_api_key_id,
     policy_id: hit._source?.policy_id,
     last_checkin: hit._source?.last_checkin,
-    last_checkin_status: hit._source?.last_checkin_status,
+    last_checkin_status:
+      hit._source?.last_checkin_status?.toLowerCase() as Agent['last_checkin_status'],
     last_checkin_message: hit._source?.last_checkin_message,
     policy_revision: hit._source?.policy_revision_idx,
     packages: hit._source?.packages ?? [],