Read time: 6 minutes
Quick Response: To fix Outlook Calendar Not Syncing Issue:
- First, check your Internet bandwidth and make sure it is stable.
- Enable the auto-sync option in Outlook.
- Update your Outlook application to the newest version.
- Remove and reconfigure your account.
- Clear the calendar cache and restart your system.
The Office 365 Calendar is a highly utilized feature that greatly simplifies users’ lives. It allows tracking of personal and others’ schedules, aiding in task management and progress sharing. You can easily share your plans with colleagues that promote collaborative teamwork and eliminate scheduling confusion.
You can effortlessly configure and sync your Office 365 calendar with Outlook, doubling your productivity in no time. However, sometimes users encounter errors and issues, and Outlook Calendar not syncing is the most common & challenging one.
Outlook Calendar not syncing issue occurs when background services fail to bridge your device with the Microsoft Exchange server, which mainly results in disrupted schedules, missed appointments, disjointed team workflows, & other severe chaos. In this article, we will explore solutions to resolve the issue of Office 365 calendar not syncing with Outlook. Additionally, we will discuss smart solutions to address this situation.
Reasons behind Outlook Calendar not syncing issue
Microsoft Outlook and Outlook for Office 365 have implemented a modern authentication system. Under this system, if you attempt to access an internet calendar file that doesn’t necessitate authentication, it will be stored on the server.
While most servers handle these capabilities well through modern authentication, some may perceive it as an invalid client request. Consequently, Outlook cannot incorporate the Calendar into its feature set. Another potential issue could lie with your PST file, which may hinder the synchronization of the Office 365 calendar with MS Outlook. If you add a shared mailbox in Outlook, it should synchronize with Calendar details.
Ensure that you have not added an incorrect calendar for syncing. In addition, the correct data is synchronized to the server.
How to Fix Outlook Calendar Not Syncing Issue?
When your Outlook Calendar is not syncing, then follow the below step-by-step process to fix. However, you’ll need to check the results after performing every single step:
Method 1: Make the Internet Connection Stable
Due to several issues like physical interference, network congestion, outdated hardware, or ISP issues, the internet may be unusable. So, deal with such issues effectively to make the internet connection fast and stable. Once done, check for ‘Outlook Calendar is not syncing’ issue.
Bonus Tip: Also, check for Microsoft service outages when events appear late, or multiple users report this issue. Check your org’s Microsoft 365 Service health page via admin center.
Method 2: Enable Auto-Sync Setting in Outlook
Usually, Outlook users keep auto sync enabled, but with further misconfiguration, it gets disabled sometimes. So, check & enable it to fix the calendar not syncing with Outlook issue. Here are the steps to enable auto-synchronization of mail items and Shared Calendar:
- Open Outlook, go to File, then Options, and then click on Advanced.
- Go to Send/Receive section and enable Send immediately when connected. Then click on the Send/Receive button.
- Enable the Perform an automatic send/receive when exiting option and click Close.
- Once done, click OK and restart Outlook.
Now check for the Outlook not syncing calendar issue.
Method 3: Update Outlook Application
The older Outlook version may have conflicts with the other tools, add-ons, or features, which may prevent sync. So, update it to the newest version to fix bugs, add new features, patch critical security vulnerabilities. Here are the steps to follow to update Outlook:
- Open Outlook on the system and click File.
- Go to Office Account, then Update Options, and tap on Update Now.
Method 4: Remove and Reconfigure Your Office 365 Account in Outlook
This method removes all inconvenience associated with the account and works well to fix Outlook calendar not syncing issues. However, you don’t need to worry about your existing Office 365 data. It will resync when you add the account again. You can also back them up if needed. The steps to remove and re-add account in Outlook are:
- Open Outlook, click File, then tap on Account Settings then Account Settings.
- Select the account you want to remove and click Remove. Tap Yes to confirm.
- Once removed, click New, enter your email address, select your account type, and follow the on-screen prompts to reconnect.
Once added successfully, wait for some time to sync, and then check for the issue.
Method 5: Clear Calendar Cache and Restart System
Cache data also gets corrupted over time, which often results in Outlook not syncing calendar issue. So, try to clear them regularly to avoid such risks. Here are the steps you can follow to do so:
- Close Outlook and press Windows + R.
- Type %localappdata%\Microsoft\Outlook in Run Window, then click OK.
- Delete any OST files. Outlook will rebuild the OST file again when you open Outlook.
Alternate Workaround to Fix the Outlook Calendar Syncing Issues
An effective solution is to utilize Outlook Web App (OWA) to address the issue of Outlook Calendar not syncing. OWA doesn’t rely on the authentication option to add calendars, allowing you to seamlessly integrate Internet calendars with MS Outlook. To add the Calendar, follow these steps:
- Sign into Outlook Web App with your Microsoft account.
- Access the Calendar module and click on Add Calendar from the menu.
- Select the Subscribe from Web
- Insert the URL and give an optimal name to the Calendar, then click Import.
Read Also: On-premises Calendar not Available to Office 365 Users
Smart Move: Backup Office 365 Data to Prevent Your Crucial Data from Loss
The process to fix Outlook Calendar not syncing is relatively straightforward. However, if none of the above techniques have proven effective for you, it’s possible that your calendar data has become inaccessible. But if you have a backup of that calendar data in PST, you can access it anytime.
Regularly backing up your Office 365 data is essential, and this can be efficiently accomplished with an automated tool like the Kernel Office 365 Backup tool. This tool ensures the swift backup of all your data from Office 365. It’s highly advisable to maintain a robust backup for your Office 365 data to PST.
Wrap Up
The issue of Office 365 calendar not syncing with Outlook is a common error that many users encounter. These problems can arise due to various factors, and there is no one-size-fits-all solution. In some cases, the mailbox may be inactive in Outlook, requiring you to restore inactive mailboxes in Office 365, as discussed in this guide.
However, there are multiple methods available to effectively resolve the Outlook Calendar not syncing issue. But if these don’t work, keeping the calendar data via backups is the only savior. So, backup Office 365 data with a reliable and trusted Office 365 backup solution.
