A Troubleshooting Guide To Microsoft 365 Sync Issues

Microsoft Sync Issues

Microsoft 365 provides essential productivity services that allow users to collaborate across devices and locations.

This includes enabling the synchronization of email, calendar appointments, contacts, tasks, and notes seamlessly between different platforms.

However, sometimes sync issues can occur, which lead to changes not syncing properly or data not staying up to date between connected services and apps.


In this guide, we will provide you with comprehensive troubleshooting instructions to identify and resolve the most common Microsoft 365 synchronization problems that may arise.

We will cover determining the potential causes of sync failures, viewing detailed error reports, troubleshooting methodology, and steps to force synchronizations when needed.

 

Why Is My Microsoft Sync Not Working?

There are a multitude of reasons that can cause Microsoft 365 synchronization to stop functioning correctly.

Here are some of the most common potential causes:

 

  • Connectivity Issues – If you have a poor internet connection, weak WiFi signal, network problems, or are trying to sync while offline, synchronization can fail or work intermittently. Always check you have a strong internet connection when troubleshooting.

 

  • Incorrect Sync Settings – Sometimes, the synchronization settings can become incorrectly configured between applications and services. It is worthwhile reviewing the sync settings in each Microsoft 365 app and checking they are set up as you expect.

 

  • Outlook Caching Problems – The Outlook desktop application maintains a local data cache, which can sometimes become out-of-date and prevent proper synchronization. Restarting Outlook will often refresh this cache.

 

  • Sync Conflicts and Errors – Synchronization conflicts and error messages are indications that something is preventing sync from completing properly. Identifying and checking these error reports is key.

 

  • Software Updates – Having outdated Microsoft 365 apps can lead to synchronization bugs and issues. Install all the latest software updates.

 

  • Account Permissions – Changes to user permissions, policies, or account access can interrupt synchronization. Check you still have the appropriate access.

 

  • Too Much Data – If there is a very large amount of data, like emails or files, to sync across locations, this can overload the sync processes and cause failures. Try reducing the amount of data.


As you can see, there are some common themes that can cause synchronization to stop working correctly.

Once you have explored the basics like internet connectivity and updated software, examining any error reports becomes critical to zeroing in on the problem.

How Do I Force Synchronize In Office 365?

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If you need to trigger a manual synchronization of Office 365 data for troubleshooting purposes, here is the process:

 

  • Open the Microsoft 365 application that you want to synchronize – This includes apps like Outlook, Calendar, People, or OneDrive.
  • Navigate to the Sync Status view or Send/Receive tab in that application. Locate the sync-related buttons.
  • Look for the “Sync All Folders”, “Sync Now,” or “Send/Receive” buttons and click this to manually initiate a synchronization.
  • A dialog box may appear showing the sync status. Allow the synchronization to be fully complete.
  • The synchronization status details should then be updated with the latest action taken and if any errors occurred.
  • You may need to restart the Office 365 app or device for the changes to fully take effect after syncing.


Manually forcing synchronizations in this manner can help surface any intermittent errors and confirm if fixes have resolved the issues.

It provides a quick way to test the sync process on demand.

How Do I Fix Office 365 Sync Issues?

Once you have diagnosed the potential cause of the Microsoft 365 synchronization problems, here are some troubleshooting steps to try to restore normal functioning:

 

  • Force Sync the Application – Manually making the application sync can restart the process and resolve intermittent failures. Click the “Sync All” or “Send/Receive” buttons to trigger this.

 

  • Update Office 365 Apps – Install the latest Microsoft 365 app updates, which often contain bug fixes for synchronization issues. Keep apps updated.

 

  • Adjust Sync Settings – Change sync settings like frequency of syncs, amount of mail synced, and offline settings. This can reduce load.

 

  • Repair Office Installation – Repairing or reinstalling the Office 365 desktop tools can resolve underlying software faults causing syncing problems.

 

  • Remove and Re-add Account – Deleting the Office 365 account from the app and re-adding it often fixes persistent sync errors by fully resetting the association.

 

  • Contact Microsoft Support – Speak to Microsoft support technicians for further specialized troubleshooting assistance for continual sync failures.

 

  • Review Account Permissions – Check all user permissions, licenses, and policies haven’t changed on the backend Office 365 admin portal affecting that account’s access.

 

Persevering with these troubleshooting steps will help identify and rectify many common Microsoft 365 synchronization problems.

Let’s now look at how to force manual synchronizations.

How Do I Force Synchronize In Office 365?

If you need to trigger a manual synchronization of Office 365 data for troubleshooting purposes, here is the process:

 

  • Open the Microsoft 365 application that you want to synchronize – This includes apps like Outlook, Calendar, People, or OneDrive.
  • Navigate to the Sync Status view or Send/Receive tab in that application. Locate the sync-related buttons.
  • Look for the “Sync All Folders”, “Sync Now,” or “Send/Receive” buttons and click this to manually initiate a synchronization.
  • A dialog box may appear showing the sync status. Allow the synchronization to be fully complete.
  • The synchronization status details should then be updated with the latest action taken and if any errors occurred.
  • You may need to restart the Office 365 app or device for the changes to fully take effect after syncing.

 

Manually forcing synchronizations in this manner can help surface any intermittent errors and confirm if fixes have resolved the issues.

It provides a quick way to test the sync process on demand.

Our Final Word

Microsoft 365 synchronization can fail due to connectivity, software bugs, data overloads, permissions, and more.

Carefully checking the detailed error reports provided by Office 365 apps is crucial to diagnosing the problem.

A methodical troubleshooting approach of reviewing basic connectivity, confirming sync settings, updating software, removing/re-adding accounts, and contacting Microsoft Support will resolve most issues.

Forcing manual synchronizations is also useful when troubleshooting. Following this guide will help get your Microsoft 365 data syncing reliably again.


Want to chat about how Microsoft 365 can benefit your business? Get in touch.

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