diff --git a/src/entrypoints/background/index.ts b/src/entrypoints/background/index.ts
index 6ec77b6..222beed 100644
--- a/src/entrypoints/background/index.ts
+++ b/src/entrypoints/background/index.ts
@@ -1,6 +1,7 @@
 import { applyUserAgentRule } from '@/entrypoints/background/net-rules'
 import { autoLogIn } from '@/features/autologin/background'
 import { fetchCourses } from '@/features/courses/background'
+import { syncMoodleCalendarUrl } from '@/features/moodle-calendar-url/background'
 import { sendSyncProgress, stopSync, syncCourses } from '@/features/search-sync/background'
 import { onMessage, sendMessageToMoodleTabs } from '@/shared/messages'
 import { refreshToken } from '@/shared/moodle-ws-api/token-store'
@@ -14,6 +15,7 @@ onMessage('POPUP_OPEN', () => {
   console.log('Background has received a message POPUP_OPEN')
   fetchCourses()
   syncCourses()
+  syncMoodleCalendarUrl()
 })
 
 onMessage('MOODLE_LOAD', () => {
@@ -36,6 +38,8 @@ onMessage('MOODLE_LOAD', () => {
         else {
           // Run the worker if needed
           syncCourses()
+          // Sync the calendar url if needed
+          syncMoodleCalendarUrl()
         }
       })
     }
diff --git a/src/features/moodle-calendar-url/background.ts b/src/features/moodle-calendar-url/background.ts
new file mode 100644
index 0000000..5174cda
--- /dev/null
+++ b/src/features/moodle-calendar-url/background.ts
@@ -0,0 +1,42 @@
+import { events } from '@/shared/innohassle-api/events'
+import { moodle } from '@/shared/moodle-ws-api'
+import { getStored } from '@/shared/storage'
+
+export async function syncMoodleCalendarUrl() {
+  console.log('Syncing Moodle calendar URL...')
+
+  const userId = await getStored('userId')
+  if (!userId) {
+    console.log('Warning: No user ID found')
+    return false
+  }
+
+  const user = await events.usersGetMe()
+  if (!user) {
+    console.log('Warning: No InNoHassle user found')
+    return false
+  }
+
+  if (user.moodle_userid === userId) {
+    console.log('Moodle userid is already connected with InNoHassle')
+    return false
+  }
+
+  try {
+    const { token } = await moodle.core.calendar.getCalendarExportToken({})
+    if (!token) {
+      console.log('Error: No Moodle calendar token found')
+      return false
+    }
+
+    await events.usersSetUserMoodleData({
+      moodle_userid: userId,
+      moodle_calendar_authtoken: token,
+    })
+
+    console.log('Moodle calendar URL have been synced successfully')
+  }
+  catch (e) {
+    console.log('Error: Couldn\'t get Moodle calendar token')
+  }
+}