How to Fix iPhone Calendar Not Syncing with Outlook Calendar
Method 1: Check Your Outlook Calendar Settings on Your iPhone
Step 1: If your Outlook account isn’t set up correctly on your iPhone, your calendar sync won’t work. Head to Settings on your iPhone.
Step 2: Click Apps, then Mail, then Mail Accounts.
Step 3: Click Outlook, then check the Calendars slide toggle is on. It should be moved to the right and the toggle should be green and white.
Top tip: If there’s a message at the top of the screen saying “Account not authenticated,” re-enter your Outlook password in the box below.
Step 4: To test if the fix worked, add an event in your iPhone calendar, ensuring you choose Outlook as the Calendar option if you use multiple calendars.
Step 5: Wait 5-10 minutes then check your Outlook calendar. The event should appear on the same date/time slot. If not, try one of the following fixes.
Method 2: Check You Have a Working Internet Connection
Step 1: If the internet is intermittent or disconnected on your iPhone, events won’t sync. Swipe down from the top left to open the Control Center.
Step 2: Check that Mobile Data is on (this should be green) as well as Wi-Fi (this should be blue). If these are working, you should see the Wi-Fi symbol and some cellular signal bars in the top left of the screen.
Step 3: Test the internet connection by opening Safari and performing an internet search.
Step 4: Check that the internet is working on your other device, e.g. PC or tablet, by performing an internet search using any browser. If the internet is working, add a test event (Steps 4 and 5 in Method 1) and see if the calendar sync is working.
Method 3: Disable Low Power Mode on Your iPhone
Step 1: Low power mode can interfere with sync settings on your iPhone. Go to Settings then Battery.
Step 2: Disable Low Power Mode which is the second option down on this page. The toggle should be white and grey/black (depending on if you have light or dark mode on) and slid to the left.
Step 3: Perform a test using Steps 4 and 5 from Method 1.
Method 4: Update Your iOS Software
Step 1: Sometimes software updates address bugs causing sync issues. Check for an update by first heading to Settings, then General.
Step 2: Click Software Update which is the second option from the top.
Step 3: The iPhone will check for an update and tell you if one is required. If needed, follow the prompts to install the update.
Tip: This can take more than ten minutes. If you urgently need to use your phone, do this later when you have more free time.
Step 4: Once the software has been updated, create a test appointment to see if the fix has worked.
Continued iPhone Calendar Not Syncing with Outlook Calendar Issues: More Things to Try
Restart both your iPhone and any other device you’re using Outlook on.
Delete and re-add your Outlook account to your iPhone, ensuring you select the Calendars option in the settings when prompted.
Reset the network settings on your iPhone by heading to Settings > General > Transfer or Reset iPhone > Reset > and pressing Reset Network Settings at the bottom of the page.
As an avid gamer, I’ve run into my fair share of error codes and weird faults that have forced me to find fixes to problems I never anticipated. That gave me a passion for sharing those fixes with others so we can all game without feeling like our hardware is rebelling against us.
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