
While Outlook’s calendar sync usually works seamlessly across devices, mobile platforms can sometimes present unique challenges. In this section, we’ll explore common troubleshooting sync steps specific to smartphones and tablets, covering both iOS and Android devices. However, they're not doing anything in particular to cause the issue - just using outlook with no add ins outside of teams, so this seems to be a new bug in the past week or two.
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Why is my Outlook calendar not showing events?
Outlook calendar syncing problems, while frustrating, are usually fixable. Common culprits include incorrect permissions, network or server issues, outdated software, cached data conflicts, and account misconfigurations. Also, be mindful of potential conflicts when multiple users edit shared calendars.
Check the connectivity to your email server
Once you have a stable and consistent network connection, you can go ahead and follow the other advanced troubleshooting solutions. If you're using an Outlook.com, Microsoft 365, or Exchange account, you won't have advanced mailbox settings unless the account was set up using advanced setup. If you still can't sync your email after removing your account Outlook troubleshooting steps and adding it again, you might need to add the account using advanced setup. For more information, see Add an account using advanced setup. I’m not seeing calendar issues, but in all fairness, we don’t use the calendar much. I am, however, seeing Outlook not authenticate to my mailbox.

Solutions to Fix the Shared Calendar not Syncing issue with Outlook
In the following sections, we’ll dive into specific solutions to get your Outlook calendar syncing smoothly again. The Virto Calendar App for Microsoft 365 & Microsoft Teams is a powerful calendar management solution designed to enhance team collaboration and streamline scheduling processes. This app bridges the gap between various Microsoft 365 apps, providing a seamless calendar syncing experience that significantly improves team planning and coordination.
Calendar sync issues - Cant see changes to other users calendars within same 365 tenancy

First, ensure you have the necessary permissions to view and edit the calendar in question. Check your send/receive settings to make sure Outlook is set to update frequently enough. Verify that you’re not in offline mode and that your internet connection is stable.
- By repairing or reinstalling MS Office, you can fix any issue with the Outlook program files that might be damaged, leading to the synchronization issues in the Outlook program.
- Try the general troubleshooting solutions in Troubleshooting Mail and Calendar apps for Windows 10.
- Below are the common reasons behind the shared calendar synchronization issues.
- Outlook calendar syncing problems, while frustrating, are usually fixable.
- Windows Defender Security Center is free security software that's included with Windows 10.
- Remember, changes to these settings might require you to restart Outlook or even your computer to take effect.
Distribution List in Outlook: Create and Manage Easily
Check the software documentation to learn how to temporarily turn it off. Firewalls and antivirus software might prevent you from syncing your email and calendar events. Below are the solutions you can follow to troubleshoot or fix the shared calendar syncing problem with Outlook. Sometimes an error appears in the Mail and Calendar apps when the apps try to sync new email or calendar events.