diff --git a/src/libs/ReportUtils.js b/src/libs/ReportUtils.js
index 1e3fc5297193..02d316b3424c 100644
--- a/src/libs/ReportUtils.js
+++ b/src/libs/ReportUtils.js
@@ -4156,6 +4156,17 @@ function shouldUseFullTitleToDisplay(report) {
     return isMoneyRequestReport(report) || isPolicyExpenseChat(report) || isChatRoom(report) || isChatThread(report) || isTaskReport(report);
 }
 
+/**
+ *
+ * @param {String} type
+ * @param {String} policyID
+ * @returns {Object}
+ */
+function getRoom(type, policyID) {
+    const room = _.find(allReports, (report) => report && report.policyID === policyID && report.chatType === type && !isThread(report));
+    return room;
+}
+
 export {
     getReportParticipantsTitle,
     isReportMessageAttachment,
@@ -4315,4 +4326,5 @@ export {
     parseReportRouteParams,
     getReimbursementQueuedActionMessage,
     getPersonalDetailsForAccountID,
+    getRoom,
 };
diff --git a/src/libs/actions/Policy.js b/src/libs/actions/Policy.js
index 9b33ff9b086e..bf064d8bf6d8 100644
--- a/src/libs/actions/Policy.js
+++ b/src/libs/actions/Policy.js
@@ -240,6 +240,69 @@ function isAdminOfFreePolicy(policies) {
     return _.some(policies, (policy) => policy && policy.type === CONST.POLICY.TYPE.FREE && policy.role === CONST.POLICY.ROLE.ADMIN);
 }
 
+/**
+ * Build optimistic data for adding members to the announce room
+ * @param {String} policyID
+ * @param {Array} accountIDs
+ * @returns {Object}
+ */
+function buildAnnounceRoomMembersOnyxData(policyID, accountIDs) {
+    const announceReport = ReportUtils.getRoom(CONST.REPORT.CHAT_TYPE.POLICY_ANNOUNCE, policyID);
+    const announceRoomMembers = {
+        onyxOptimisticData: [],
+        onyxFailureData: [],
+    };
+
+    announceRoomMembers.onyxOptimisticData.push({
+        onyxMethod: Onyx.METHOD.MERGE,
+        key: `${ONYXKEYS.COLLECTION.REPORT}${announceReport.reportID}`,
+        value: {
+            participantAccountIDs: [...announceReport.participantAccountIDs, ...accountIDs],
+        },
+    });
+
+    announceRoomMembers.onyxFailureData.push({
+        onyxMethod: Onyx.METHOD.MERGE,
+        key: `${ONYXKEYS.COLLECTION.REPORT}${announceReport.reportID}`,
+        value: {
+            participantAccountIDs: announceReport.participantAccountIDs,
+        },
+    });
+    return announceRoomMembers;
+}
+
+/**
+ * Build optimistic data for removing users from the announce room
+ * @param {String} policyID
+ * @param {Array} accountIDs
+ * @returns {Object}
+ */
+function removeOptimisticAnnounceRoomMembers(policyID, accountIDs) {
+    const announceReport = ReportUtils.getRoom(CONST.REPORT.CHAT_TYPE.POLICY_ANNOUNCE, policyID);
+    const announceRoomMembers = {
+        onyxOptimisticData: [],
+        onyxFailureData: [],
+    };
+
+    const remainUsers = _.difference(announceReport.participantAccountIDs, accountIDs);
+    announceRoomMembers.onyxOptimisticData.push({
+        onyxMethod: Onyx.METHOD.MERGE,
+        key: `${ONYXKEYS.COLLECTION.REPORT}${announceReport.reportID}`,
+        value: {
+            participantAccountIDs: [...remainUsers],
+        },
+    });
+
+    announceRoomMembers.onyxFailureData.push({
+        onyxMethod: Onyx.METHOD.MERGE,
+        key: `${ONYXKEYS.COLLECTION.REPORT}${announceReport.reportID}`,
+        value: {
+            participantAccountIDs: announceReport.participantAccountIDs,
+        },
+    });
+    return announceRoomMembers;
+}
+
 /**
  * Remove the passed members from the policy employeeList
  *
@@ -260,6 +323,8 @@ function removeMembers(accountIDs, policyID) {
         ReportUtils.buildOptimisticClosedReportAction(sessionEmail, policy.name, CONST.REPORT.ARCHIVE_REASON.REMOVED_FROM_POLICY),
     );
 
+    const announceRoomMembers = removeOptimisticAnnounceRoomMembers(policyID, accountIDs);
+
     const optimisticData = [
         {
             onyxMethod: Onyx.METHOD.MERGE,
@@ -281,6 +346,7 @@ function removeMembers(accountIDs, policyID) {
             key: `${ONYXKEYS.COLLECTION.REPORT_ACTIONS}${workspaceChats[index].reportID}`,
             value: {[reportAction.reportActionID]: reportAction},
         })),
+        ...announceRoomMembers.onyxOptimisticData,
     ];
 
     // If the policy has primaryLoginsInvited, then it displays informative messages on the members page about which primary logins were added by secondary logins.
@@ -332,6 +398,7 @@ function removeMembers(accountIDs, policyID) {
             key: `${ONYXKEYS.COLLECTION.REPORT_ACTIONS}${workspaceChats[index].reportID}`,
             value: {[reportAction.reportActionID]: null},
         })),
+        ...announceRoomMembers.onyxFailureData,
     ];
     API.write(
         'DeleteMembersFromWorkspace',
@@ -447,6 +514,8 @@ function addMembersToWorkspace(invitedEmailsToAccountIDs, welcomeNote, policyID)
     const accountIDs = _.values(invitedEmailsToAccountIDs);
     const newPersonalDetailsOnyxData = PersonalDetailsUtils.getNewPersonalDetailsOnyxData(logins, accountIDs);
 
+    const announceRoomMembers = buildAnnounceRoomMembersOnyxData(policyID, accountIDs);
+
     // create onyx data for policy expense chats for each new member
     const membersChats = createPolicyExpenseChats(policyID, invitedEmailsToAccountIDs);
 
@@ -460,6 +529,7 @@ function addMembersToWorkspace(invitedEmailsToAccountIDs, welcomeNote, policyID)
         },
         ...newPersonalDetailsOnyxData.optimisticData,
         ...membersChats.onyxOptimisticData,
+        ...announceRoomMembers.onyxOptimisticData,
     ];
 
     const successData = [
@@ -507,6 +577,7 @@ function addMembersToWorkspace(invitedEmailsToAccountIDs, welcomeNote, policyID)
         },
         ...newPersonalDetailsOnyxData.failureData,
         ...membersChats.onyxFailureData,
+        ...announceRoomMembers.onyxFailureData,
     ];
 
     const params = {