Outlook Calendar not syncing [Fix]

If your Outlook Calendar is not syncing with Google Calendar, Teams, iPhone, Android, Zoom, Office account, etc., take these steps to fix the issue.

The Calendar app can connect to other calendaring services like Google Calendar, iPhone, Android, Microsoft Office 365, and more, and this can be quite useful as it syncs automatically. But what if Outlook Calendar fails to sync with third-party calendars? The possible reasons could be the wrong calendar selected for sync, the calendar not being visible, background app interference, outdated Outlook app or the Calendar app, and so on.

Preliminary methods to fix Outlook Calendar not syncing

We have covered this problem with various other apps and have shortlisted some of the solutions that are 100% working. So, follow the below solutions for a foolproof fix:

Before you try the troubleshooting methods, you can try a few preliminary methods as below:

Check the network and internet connectivity.
Change the phone network to Wi-Fi if it connects to the cellular network.
Update the device regularly.
Use the latest version of the Outlook app.
Update the Outlook Calendar app on your phone.
Turn off airplane mode.
Disable low power mode on your phone.
Accept or reject Calendars from only one device.
Close any background apps.
Set only administrators to allow or deny calendar requests.

If the above methods fail to fix the issue, read on.

How to fix Outlook Calendar not syncing with iPhone?

1. Verify if you are using the correct Outlook account

When Calendar stops syncing, check if you are signed into the correct Outlook account.

Navigate to the Settings menu > Passwords and Accounts > Add Account (if not signed in to the correct account).

2. Check if the Outlook Calendar is visible

If you have not set the Outlook Calendar as visible on your iPhone, you won’t see the calendar events even if Google is syncing fine. Therefore, follow the below steps to make your Outlook calendar visible:

On your iPhone, open Outlook Calendar.

Tap on the profile picture on the upper left side of the screen.

3. Remove the Outlook account and add it again

You can also try removing the Outlook account from your iPhone and adding it again to check if that’s causing the issue.

Launch the Outlook app > profile picture on top left > My Calendars > locate the calendar > settings (gear) icon > Remove Shared Calendar.

Return to Home Page > profile picture icon > settings (gear) icon on the bottom left > Add Email Account.

4. Reconnect the calendars in Outlook Calendar

Since it’s not possible to reconnect shared calendars from Outlook, iCloud, or Google Calendars on iPhone or iPad, we recommend using the Outlook web app (explained in step 2 above). This will help you reconnect the third-party calendars in Outlook Calendar.

5. Uninstall and reinstall the Outlook Calendar app

If Calendar is still not syncing on your iPhone, delete the app and reinstall it to fix the issue.

For this, locate the Outlook app on your device > tap and hold the app icon > Delete App.

Now, launch the App Store > download the Outlook App > Sign in.

Read: Outlook Calendar not showing Holidays

How to fix Outlook Calendar fails to sync with Android?

1. Make the Calendar visible

If you have not yet selected the Outlook calendar app, that may be why it’s not syncing.

So, to fix this, navigate to Outlook Calendar app > open the app > tap on the profile picture on the upper left > locate the calendar having the syncing problem > select the Calendar.

Read: How to sync Outlook Calendar with Samsung device calendar

2. Clear phone storage

The Outlook Calendar may sometimes not sync properly if there’s insufficient storage space on your phone. In this case, clearing phone storage is advised to make space.

Navigate to Settings (gear icon) > Storage/Storage & Memory > find Storage here > check the storage details for each app or media item.

Now, clear any junk items from your device to make space.

Read: How to use Outlook Calendar as a To-Do list app

How to fix Google Calendar not syncing with Outlook Calendar?

While you can try a free software to sync Google Calendar to Outlook Calendar, you can also manually sycn both the Calendar apps. However, before you sync both calendars, you must first remove the Google Calendar.

Open Outlook Calendar.
Expand the My Calendars section on the left.
Place the mouse over the Google Calendar you want to delete, click on the three dots next to it, and select Remove.
Now, open Google Calendar.
On the left sidebar, place the mouse over the Calendar you want to sync, click on three dots, and select Settings and Sharing.
Next, in the Settings screen, on the right, scroll down and go to the Secret address in iCal format section. Copy the link.
Go to the Outlook Calendar, and on the left sidebar, click on Add Calendar.
On the next screen, select the Subscribe from web option on the left.
Now, on the right paste the copied secret address in iCal format, name the calendar, make any other edits and press the Import button.

Read:

The Google Calendar will now sync with the Outlook Calendar successfully.

How to fix the Outlook Calendar web app not syncing?

It is possible that the Outlook app is syncing properly but the Calendar is not visible, causing the issue. In this case, you should check if the Calendar is selected. If not, then select the account.

For this, open the Outlook Calendar > expand My calendars on the left sidebar > locate the calendar that’s not syncing > select it if not selected already.

Alternatively, you can remove the calendar that’s not syncing and reconnect it with the Outlook Calendar as shown in Method 5.

Read: How to copy an Outlook Calendar Appointment to another day

How to fix Outlook Calendar sync issues with Office 365?

If your Outlook Calendar sync has sync issues with Office 365, it could be due to improper settings. In this case, you must change the Outlook settings to enable sync.

For this, open the Outlook app > File tab > Info > Account Settings.

Now, in the Account Settings window > Data File tab > select the required data file > Email tab > select the Office 365 account > Change.

In the new wizard > enter your account name > check the box next to Use Cached Exchange Mode.

TIP: You can repair the corrupt Outlook PST data files using the Outlook Inbox Repair Tool.

Why is my Outlook Calendar not showing appointments?

To show appointments in your Outlook calendar, check if the Calendar is visible in the To-Do Bar. For this, go to View > To-Do Bar > Calendar and select the relevant box. This will enable your calendar’s visibility, and display your appointments. Remember to save any changes by clicking OK.

How do I force my Outlook Calendar to sync?

To force your Outlook calendar to sync, navigate to the Calendar view, look for the Send/Receive tab, and click Send/Receive All Folders. This action will force Outlook to instantly update and sync all your calendar entries with connected accounts, ensuring your schedule is current across your devices.