diff --git a/packages/trpc/server/routers/viewer/workflows/activateEventType.handler.ts b/packages/trpc/server/routers/viewer/workflows/activateEventType.handler.ts
index 9ec85ae4f7..1995d02bc7 100644
--- a/packages/trpc/server/routers/viewer/workflows/activateEventType.handler.ts
+++ b/packages/trpc/server/routers/viewer/workflows/activateEventType.handler.ts
@@ -1,5 +1,15 @@
+import {
+  deleteScheduledEmailReminder,
+  scheduleEmailReminder,
+} from "@calcom/features/ee/workflows/lib/reminders/emailReminderManager";
+import {
+  deleteScheduledSMSReminder,
+  scheduleSMSReminder,
+} from "@calcom/features/ee/workflows/lib/reminders/smsReminderManager";
+import { SENDER_ID, SENDER_NAME } from "@calcom/lib/constants";
 import { prisma } from "@calcom/prisma";
-import { MembershipRole, WorkflowActions } from "@calcom/prisma/enums";
+import { BookingStatus } from "@calcom/prisma/client";
+import { MembershipRole, WorkflowActions, WorkflowMethods } from "@calcom/prisma/enums";
 import type { TrpcSessionUser } from "@calcom/trpc/server/trpc";
 
 import { TRPCError } from "@trpc/server";
@@ -17,7 +27,7 @@ type ActivateEventTypeOptions = {
 export const activateEventTypeHandler = async ({ ctx, input }: ActivateEventTypeOptions) => {
   const { eventTypeId, workflowId } = input;
 
-  // Check that vent type belong to the user or team
+  // Check that event type belong to the user or team
   const userEventType = await prisma.eventType.findFirst({
     where: {
       id: eventTypeId,
@@ -76,6 +86,35 @@ export const activateEventTypeHandler = async ({ ctx, input }: ActivateEventType
   });
 
   if (isActive) {
+    // disable workflow for this event type & delete all reminders
+    const remindersToDelete = await prisma.workflowReminder.findMany({
+      where: {
+        booking: {
+          eventTypeId: eventTypeId,
+          userId: ctx.user.id,
+        },
+        workflowStepId: {
+          in: eventTypeWorkflow.steps.map((step) => {
+            return step.id;
+          }),
+        },
+      },
+      select: {
+        id: true,
+        referenceId: true,
+        method: true,
+        scheduled: true,
+      },
+    });
+
+    remindersToDelete.forEach((reminder) => {
+      if (reminder.method === WorkflowMethods.EMAIL) {
+        deleteScheduledEmailReminder(reminder.id, reminder.referenceId);
+      } else if (reminder.method === WorkflowMethods.SMS) {
+        deleteScheduledSMSReminder(reminder.id, reminder.referenceId);
+      }
+    });
+
     await prisma.workflowsOnEventTypes.deleteMany({
       where: {
         workflowId,
@@ -88,6 +127,99 @@ export const activateEventTypeHandler = async ({ ctx, input }: ActivateEventType
       eventTypeId,
     });
   } else {
+    // activate workflow and schedule reminders for existing bookings
+
+    const bookingsForReminders = await prisma.booking.findMany({
+      where: {
+        eventTypeId: eventTypeId,
+        status: BookingStatus.ACCEPTED,
+        startTime: {
+          gte: new Date(),
+        },
+      },
+      include: {
+        attendees: true,
+        eventType: true,
+        user: true,
+      },
+    });
+
+    for (const booking of bookingsForReminders) {
+      const bookingInfo = {
+        uid: booking.uid,
+        attendees: booking.attendees.map((attendee) => {
+          return {
+            name: attendee.name,
+            email: attendee.email,
+            timeZone: attendee.timeZone,
+            language: { locale: attendee.locale || "" },
+          };
+        }),
+        organizer: booking.user
+          ? {
+              name: booking.user.name || "",
+              email: booking.user.email,
+              timeZone: booking.user.timeZone,
+              language: { locale: booking.user.locale || "" },
+            }
+          : { name: "", email: "", timeZone: "", language: { locale: "" } },
+        startTime: booking.startTime.toISOString(),
+        endTime: booking.endTime.toISOString(),
+        title: booking.title,
+        language: { locale: booking?.user?.locale || "" },
+        eventType: {
+          slug: booking.eventType?.slug,
+        },
+      };
+      for (const step of eventTypeWorkflow.steps) {
+        if (step.action === WorkflowActions.EMAIL_ATTENDEE || step.action === WorkflowActions.EMAIL_HOST) {
+          let sendTo: string[] = [];
+
+          switch (step.action) {
+            case WorkflowActions.EMAIL_HOST:
+              sendTo = [bookingInfo.organizer?.email];
+              break;
+            case WorkflowActions.EMAIL_ATTENDEE:
+              sendTo = bookingInfo.attendees.map((attendee) => attendee.email);
+              break;
+          }
+
+          await scheduleEmailReminder(
+            bookingInfo,
+            eventTypeWorkflow.trigger,
+            step.action,
+            {
+              time: eventTypeWorkflow.time,
+              timeUnit: eventTypeWorkflow.timeUnit,
+            },
+            sendTo,
+            step.emailSubject || "",
+            step.reminderBody || "",
+            step.id,
+            step.template,
+            step.sender || SENDER_NAME
+          );
+        } else if (step.action === WorkflowActions.SMS_NUMBER && step.sendTo) {
+          await scheduleSMSReminder(
+            bookingInfo,
+            step.sendTo,
+            eventTypeWorkflow.trigger,
+            step.action,
+            {
+              time: eventTypeWorkflow.time,
+              timeUnit: eventTypeWorkflow.timeUnit,
+            },
+            step.reminderBody || "",
+            step.id,
+            step.template,
+            step.sender || SENDER_ID,
+            booking.userId,
+            eventTypeWorkflow.teamId
+          );
+        }
+      }
+    }
+
     await prisma.workflowsOnEventTypes.create({
       data: {
         workflowId,
diff --git a/packages/trpc/server/routers/viewer/workflows/update.handler.ts b/packages/trpc/server/routers/viewer/workflows/update.handler.ts
index 69263c9eb5..45d538286b 100644
--- a/packages/trpc/server/routers/viewer/workflows/update.handler.ts
+++ b/packages/trpc/server/routers/viewer/workflows/update.handler.ts
@@ -532,7 +532,7 @@ export const updateHandler = async ({ ctx, input }: UpdateOptions) => {
               user: true,
             },
           });
-          bookingsForReminders.forEach(async (booking) => {
+          for (const booking of bookingsForReminders) {
             const bookingInfo = {
               uid: booking.uid,
               attendees: booking.attendees.map((attendee) => {
@@ -611,7 +611,7 @@ export const updateHandler = async ({ ctx, input }: UpdateOptions) => {
                 userWorkflow.teamId
               );
             }
-          });
+          }
         }
       }
     });