diff --git a/striker-ui/components/ManageMailRecipient/AddMailRecipientForm.tsx b/striker-ui/components/ManageMailRecipient/AddMailRecipientForm.tsx
index 063031e4..f3007c15 100644
--- a/striker-ui/components/ManageMailRecipient/AddMailRecipientForm.tsx
+++ b/striker-ui/components/ManageMailRecipient/AddMailRecipientForm.tsx
@@ -111,6 +111,98 @@ const MAP_TO_LEVEL_LABEL: Record<number, string> = {
   4: 'Info',
 };
 
+const getAlertOverrideRequestList = (
+  current: MailRecipientFormikMailRecipient,
+  initial?: MailRecipientFormikMailRecipient,
+  urlPrefix = '/alert-override',
+): AlertOverrideRequest[] => {
+  const { uuid: mailRecipientUuid } = current;
+
+  if (!mailRecipientUuid) return [];
+
+  return Object.values(current.alertOverrides).reduce<AlertOverrideRequest[]>(
+    (previous, value) => {
+      if (value.delete && value.uuids) {
+        /**
+         * 1 or more existing records marked for removal.
+         */
+        previous.push(
+          ...Object.keys(value.uuids).map<AlertOverrideRequest>((uuid) => ({
+            method: 'delete',
+            url: `${urlPrefix}/${uuid}`,
+          })),
+        );
+
+        return previous;
+      }
+
+      const { level, target, uuids } = value;
+
+      if (!target) return previous;
+
+      const hosts: string[] = target.subnodes ?? [target.uuid];
+
+      if (uuids) {
+        /**
+         * Found existing alert override UUIDs; the requests must be updates.
+         */
+
+        const slots: string[] = Object.keys(uuids);
+
+        const longest = Math.max(slots.length, hosts.length);
+
+        previous.push(
+          ...Array.from({ length: longest }).map<AlertOverrideRequest>(
+            (ignore, i) => {
+              const host = hosts[i];
+              const slot = slots[i];
+
+              if (!slot) {
+                return {
+                  body: { hostUuid: host, level, mailRecipientUuid },
+                  method: 'post',
+                  url: urlPrefix,
+                };
+              }
+
+              const url = `${urlPrefix}/${slot}`;
+
+              if (!host) {
+                return {
+                  method: 'delete',
+                  url,
+                };
+              }
+
+              return {
+                body: { hostUuid: host, level, mailRecipientUuid },
+                method: 'put',
+                url,
+              };
+            },
+          ),
+        );
+
+        return previous;
+      }
+
+      /**
+       * No existing alert override UUIDs, meaning these are new records.
+       */
+      previous.push(
+        ...hosts.map<AlertOverrideRequest>((hostUuid) => ({
+          body: { hostUuid, level, mailRecipientUuid },
+          method: 'post',
+          url: urlPrefix,
+        })),
+      );
+
+      return previous;
+    },
+    [],
+  );
+};
+
 const AddMailRecipientForm: FC<AddMailRecipientFormProps> = (props) => {
   const {
     alertOverrideTargetOptions,
@@ -132,7 +224,6 @@ const AddMailRecipientForm: FC<AddMailRecipientFormProps> = (props) => {
         language: 'en_CA',
         level: 2,
         name: '',
-        uuid: mrUuid,
       },
     },
     onSubmit: (values, { setSubmitting }) => {
@@ -146,6 +237,8 @@ const AddMailRecipientForm: FC<AddMailRecipientFormProps> = (props) => {
       let titleText: string = `Add mail recipient with the following?`;
       let url: string = '/mail-recipient';
 
+      let alertOverrideRequestList: AlertOverrideRequest[];
+
       if (previousFormikValues) {
         actionProceedText = 'Update';
         errorMessage = <>Failed to update mail server.</>;
@@ -153,18 +246,49 @@ const AddMailRecipientForm: FC<AddMailRecipientFormProps> = (props) => {
         successMessage = <>Mail recipient updated.</>;
         titleText = `Update ${mailRecipient.name} with the following?`;
         url += `/${mrUuid}`;
+
+        alertOverrideRequestList = getAlertOverrideRequestList(
+          mailRecipient,
+          previousFormikValues[mrUuid],
+        );
+      } else {
+        alertOverrideRequestList = getAlertOverrideRequestList(mailRecipient);
       }
 
-      const { alertOverrides, uuid, ...mrBody } = mailRecipient;
+      const { alertOverrides, uuid: ignore, ...mrBody } = mailRecipient;
 
       confirm.prepare({
         actionProceedText,
-        content: <FormSummary entries={mrBody} />,
+        content: (
+          <>
+            <FormSummary entries={mrBody} />
+            <FormSummary
+              entries={Object.entries(alertOverrides).reduce<
+                Record<string, { level: number; name: string }>
+              >((previous, [valueId, value]) => {
+                if (!value.target) return previous;
+
+                previous[valueId] = {
+                  level: value.level,
+                  name: value.target.name,
+                };
+
+                return previous;
+              }, {})}
+            />
+          </>
+        ),
         onCancelAppend: () => setSubmitting(false),
         onProceedAppend: () => {
           confirm.loading(true);
 
-          api[method](url, mrBody)
+          const promises = [api[method](url, mrBody)];
+
+          alertOverrideRequestList.forEach((request) => {
+            promises.push(api[request.method](request.url, request.body));
+          });
+
+          Promise.all(promises)
             .then(() => confirm.finish('Success', { children: successMessage }))
             .catch((error) => {
               const emsg = handleAPIError(error);
diff --git a/striker-ui/components/ManageMailRecipient/AlertOverrideInputGroup.tsx b/striker-ui/components/ManageMailRecipient/AlertOverrideInputGroup.tsx
index 5bbcf331..d4c2a99e 100644
--- a/striker-ui/components/ManageMailRecipient/AlertOverrideInputGroup.tsx
+++ b/striker-ui/components/ManageMailRecipient/AlertOverrideInputGroup.tsx
@@ -10,6 +10,7 @@ import { BodyText, SmallText } from '../Text';
 import UncontrolledInput from '../UncontrolledInput';
 
 const LEVEL_OPTIONS: SelectItem<number>[] = [
+  { displayValue: 'Ignore', value: 0 },
   { displayValue: 'Critical', value: 1 },
   { displayValue: 'Warning', value: 2 },
   { displayValue: 'Notice', value: 3 },
@@ -19,14 +20,18 @@ const LEVEL_OPTIONS: SelectItem<number>[] = [
 const AlertOverrideInputGroup: FC<AlertOverrideInputGroupProps> = (props) => {
   const {
     alertOverrideTargetOptions,
-    alertOverrideUuid,
+    alertOverrideValueId,
     mailRecipientUuid: mrUuid,
     formikUtils,
   } = props;
 
-  const aoUuid = useMemo<string>(
-    () => alertOverrideUuid ?? uuidv4(),
-    [alertOverrideUuid],
+  /**
+   * This is the alert override formik value identifier; not to be confused
+   * with the alert override UUID.
+   */
+  const aoVid = useMemo<string>(
+    () => alertOverrideValueId ?? uuidv4(),
+    [alertOverrideValueId],
   );
 
   const { formik } = formikUtils;
@@ -34,12 +39,17 @@ const AlertOverrideInputGroup: FC<AlertOverrideInputGroupProps> = (props) => {
     values: { [mrUuid]: mailRecipient },
   } = formik;
   const {
-    alertOverrides: { [aoUuid]: alertOverride },
+    alertOverrides: { [aoVid]: alertOverride },
   } = mailRecipient;
 
   const overrideChain = useMemo<string>(
-    () => `${mrUuid}.alertOverrides.${aoUuid}`,
-    [aoUuid, mrUuid],
+    () => `${mrUuid}.alertOverrides.${aoVid}`,
+    [aoVid, mrUuid],
+  );
+
+  const deleteChain = useMemo<string>(
+    () => `${overrideChain}.delete`,
+    [overrideChain],
   );
   const targetChain = useMemo<string>(
     () => `${overrideChain}.target`,
@@ -105,7 +115,19 @@ const AlertOverrideInputGroup: FC<AlertOverrideInputGroupProps> = (props) => {
         <IconButton
           mapPreset="delete"
           onClick={() => {
-            formik.setFieldValue(overrideChain, undefined, true);
+            if (alertOverride.uuids) {
+              formik.setFieldValue(deleteChain, true, true);
+            } else {
+              formik.setValues((previous) => {
+                const shallow = { ...previous };
+                const { [mrUuid]: mr } = shallow;
+                const { [aoVid]: remove, ...keep } = mr.alertOverrides;
+
+                mr.alertOverrides = { ...keep };
+
+                return shallow;
+              });
+            }
           }}
           size="small"
         />
diff --git a/striker-ui/components/ManageMailRecipient/ManageAlertOverride.tsx b/striker-ui/components/ManageMailRecipient/ManageAlertOverride.tsx
index aea0583f..cfe2ff92 100644
--- a/striker-ui/components/ManageMailRecipient/ManageAlertOverride.tsx
+++ b/striker-ui/components/ManageMailRecipient/ManageAlertOverride.tsx
@@ -29,28 +29,34 @@ const ManageAlertOverride: FC<ManageAlertOverrideProps> = (props) => {
       listEmpty="No alert overrides(s)"
       listItems={alertOverrides}
       onAdd={() => {
-        const aoUuid = uuidv4();
+        /**
+         * This is **not** the same as an alert override UUID because 1 alert
+         * override formik value can reference _n_ alert override rules, where
+         * _n_ is the number of subnodes per node. */
+        const valueId = uuidv4();
 
         formik.setValues((previous) => {
-          const current = { ...previous };
+          const shallow = { ...previous };
+          const { [mrUuid]: mr } = shallow;
 
-          current[mrUuid].alertOverrides[aoUuid] = {
-            level: 2,
-            target: null,
-            uuid: aoUuid,
+          mr.alertOverrides = {
+            ...mr.alertOverrides,
+            [valueId]: { level: 2, target: null },
           };
 
-          return current;
+          return shallow;
         });
       }}
-      renderListItem={(uuid) => (
-        <AlertOverrideInputGroup
-          alertOverrideTargetOptions={alertOverrideTargetOptions}
-          alertOverrideUuid={uuid}
-          formikUtils={formikUtils}
-          mailRecipientUuid={mrUuid}
-        />
-      )}
+      renderListItem={(valueId, value) =>
+        !value.delete && (
+          <AlertOverrideInputGroup
+            alertOverrideTargetOptions={alertOverrideTargetOptions}
+            alertOverrideValueId={valueId}
+            formikUtils={formikUtils}
+            mailRecipientUuid={mrUuid}
+          />
+        )
+      }
     />
   );
 };
diff --git a/striker-ui/components/ManageMailRecipient/ManageMailRecipient.tsx b/striker-ui/components/ManageMailRecipient/ManageMailRecipient.tsx
index 01d7a185..45fdebb6 100644
--- a/striker-ui/components/ManageMailRecipient/ManageMailRecipient.tsx
+++ b/striker-ui/components/ManageMailRecipient/ManageMailRecipient.tsx
@@ -24,26 +24,34 @@ const ManageMailRecipient: FC = () => {
       Object.values(nodes)
         .sort((a, b) => a.name.localeCompare(b.name))
         .reduce<AlertOverrideTarget[]>((options, node) => {
-          options.push({
+          const nodeTarget: AlertOverrideTarget = {
             description: node.description,
             name: node.name,
             node: node.uuid,
+            subnodes: [],
             type: 'node',
             uuid: node.uuid,
-          });
+          };
 
-          Object.values(node.hosts)
+          const subnodeTargets = Object.values(node.hosts)
             .sort((a, b) => a.name.localeCompare(b.name))
-            .forEach((subnode) => {
-              if (subnode.type === 'dr') return;
+            .reduce<AlertOverrideTarget[]>((previous, subnode) => {
+              if (subnode.type === 'dr') return previous;
 
-              options.push({
+              previous.push({
                 name: subnode.name,
                 node: node.uuid,
                 type: 'subnode',
                 uuid: subnode.uuid,
               });
-            });
+
+              nodeTarget.subnodes?.push(subnode.uuid);
+
+              return previous;
+            }, []);
+
+          // Append the options in sequence: node followed by its subnode(s).
+          options.push(nodeTarget, ...subnodeTargets);
 
           return options;
         }, []),
@@ -59,40 +67,87 @@ const ManageMailRecipient: FC = () => {
   const formikAlertOverrides = useMemo<
     AlertOverrideFormikValues | undefined
   >(() => {
-    if (!alertOverrides) return undefined;
-
-    const groups: Record<string, number> = {};
-
-    return Object.values(alertOverrides).reduce<AlertOverrideFormikValues>(
-      (previous, value) => {
-        const { level, node, subnode, uuid } = value;
-
-        groups[node.uuid] = groups[node.uuid] ? groups[node.uuid] + 1 : 1;
-
-        previous[uuid] = {
-          level,
-          target:
-            groups[node.uuid] > 1
-              ? {
-                  name: node.name,
-                  node: node.uuid,
-                  type: 'node',
-                  uuid: node.uuid,
-                }
-              : {
-                  name: subnode.name,
-                  node: node.uuid,
-                  type: 'subnode',
-                  uuid: subnode.uuid,
-                },
-          uuid,
-        };
+    if (!nodes || !alertOverrides) return undefined;
+
+    /**
+     * Group alert override rules based on node UUID. The groups will be used
+     * for comparison to see whether the subnodes are assigned the same alert
+     * level.
+     *
+     * If subnodes have the same level, they will be consolidated into a single
+     * target for display. Otherwise, every subnode will get its own visual.
+     */
+    const groups = Object.values(alertOverrides).reduce<
+      Record<string, APIAlertOverrideOverview[]>
+    >((previous, override) => {
+      const {
+        node: { uuid: nodeUuid },
+      } = override;
+
+      if (previous[nodeUuid]) {
+        previous[nodeUuid].push(override);
+      } else {
+        previous[nodeUuid] = [override];
+      }
+
+      return previous;
+    }, {});
+
+    return Object.entries(groups).reduce<AlertOverrideFormikValues>(
+      (previous, pair) => {
+        const [nodeUuid, overrides] = pair;
+        const [firstOverride, ...restOverrides] = overrides;
+
+        const sameLevel =
+          overrides.length > 1 &&
+          restOverrides.every(({ level }) => level === firstOverride.level);
+
+        if (sameLevel) {
+          const {
+            0: { level },
+          } = overrides;
+
+          const { [nodeUuid]: node } = nodes;
+
+          previous[nodeUuid] = {
+            level,
+            target: {
+              description: node.description,
+              name: node.name,
+              node: node.uuid,
+              subnodes: overrides.map<string>(({ subnode: { uuid } }) => uuid),
+              type: 'node',
+              uuid: node.uuid,
+            },
+            uuids: overrides.reduce<Record<string, string>>(
+              (uuids, { subnode, uuid: overrideUuid }) => {
+                uuids[overrideUuid] = subnode.uuid;
+
+                return uuids;
+              },
+              {},
+            ),
+          };
+        } else {
+          overrides.forEach(({ level, node, subnode, uuid: overrideUuid }) => {
+            previous[subnode.uuid] = {
+              level,
+              target: {
+                name: subnode.name,
+                node: node.uuid,
+                type: 'subnode',
+                uuid: subnode.uuid,
+              },
+              uuids: { [overrideUuid]: subnode.uuid },
+            };
+          });
+        }
 
         return previous;
       },
       {},
     );
-  }, [alertOverrides]);
+  }, [alertOverrides, nodes]);
 
   return (
     <>
diff --git a/striker-ui/components/ManageMailRecipient/schema.ts b/striker-ui/components/ManageMailRecipient/schema.ts
index d4d3e3d9..4d833a38 100644
--- a/striker-ui/components/ManageMailRecipient/schema.ts
+++ b/striker-ui/components/ManageMailRecipient/schema.ts
@@ -2,15 +2,16 @@ import * as yup from 'yup';
 
 import buildYupDynamicObject from '../../lib/buildYupDynamicObject';
 
-const alertLevelSchema = yup.number().oneOf([1, 2, 3, 4]);
+const alertLevelSchema = yup.number().oneOf([0, 1, 2, 3, 4]);
 
 const alertOverrideSchema = yup.object({
+  delete: yup.boolean().optional(),
   level: alertLevelSchema.required(),
   target: yup.object({
     type: yup.string().oneOf(['node', 'subnode']).required(),
     uuid: yup.string().uuid().required(),
   }),
-  uuid: yup.string().uuid().required(),
+  uuid: yup.string().uuid().optional(),
 });
 
 const alertOverrideListSchema = yup.lazy((entries) =>
@@ -23,7 +24,7 @@ const mailRecipientSchema = yup.object({
   language: yup.string().oneOf(['en_CA']).optional(),
   level: alertLevelSchema.required(),
   name: yup.string().required(),
-  uuid: yup.string().uuid().required(),
+  uuid: yup.string().uuid().optional(),
 });
 
 const mailRecipientListSchema = yup.lazy((entries) =>
diff --git a/striker-ui/types/ManageMailRecipient.d.ts b/striker-ui/types/ManageMailRecipient.d.ts
index c0196408..382c2306 100644
--- a/striker-ui/types/ManageMailRecipient.d.ts
+++ b/striker-ui/types/ManageMailRecipient.d.ts
@@ -1,23 +1,36 @@
+type AlertOverrideRequest = {
+  body?: {
+    hostUuid: string;
+    level: number;
+    mailRecipientUuid: string;
+  };
+  method: 'delete' | 'post' | 'put';
+  url: string;
+};
+
 type AlertOverrideTarget = {
   description?: string;
   name: string;
   node: string;
+  subnodes?: string[];
   type: 'node' | 'subnode';
   uuid: string;
 };
 
 type AlertOverrideFormikAlertOverride = {
+  delete?: boolean;
   level: number;
   target: AlertOverrideTarget | null;
-  uuid: string;
+  uuids?: Record<string, string>;
 };
 
 type AlertOverrideFormikValues = {
-  [uuid: string]: AlertOverrideFormikAlertOverride;
+  [valueId: string]: AlertOverrideFormikAlertOverride;
 };
 
-type MailRecipientFormikMailRecipient = APIMailRecipientDetail & {
+type MailRecipientFormikMailRecipient = Omit<APIMailRecipientDetail, 'uuid'> & {
   alertOverrides: AlertOverrideFormikValues;
+  uuid?: string;
 };
 
 type MailRecipientFormikValues = {
@@ -54,7 +67,7 @@ type ManageAlertOverrideProps = Required<
 /** AlertOverrideInputGroup */
 
 type AlertOverrideInputGroupOptionalProps = {
-  alertOverrideUuid?: string;
+  alertOverrideValueId?: string;
 };
 
 type AlertOverrideInputGroupProps = AlertOverrideInputGroupOptionalProps &