This software also has a splitter option to split large-sized PST files into smaller ones, helping users prevent oversized PST file issues. After the files get repaired, restart the Outlook program to ensure that the Outlook syncing issues are resolved or not. Now, we will verify the server settings to fix the Outlook synchronization error. After performing these steps, Outlook’s all folders will be synced to the server. If this method doesn’t work for you, navigate to other solutions. Knowing the reasons behind the Outlook sync issues will help us to fix this problem and prevent issues in communication and workflow.

Common Reasons Behind Outlook Sync Issues

After these instructions, ensure the sync settings are correct and check everything is working well. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical fix MFA prompts not working support.

Manual solutions to resolve Outlook synchronization issues

The other solution to fix Outlook sync issues is recreating Microsoft Outlook profile. Outlook sync issues can be because of corrupted Outlook OST or PST files. Therefore, now we will know the steps to repair the Outlook data file. When Outlook gets stuck on "Synchronizing Folders", it’s usually a sync or file corruption issue — not a permanent failure.

Step 10 – Rebuild Offline Cache (OST)

• Therefore, now we will know the steps to repair the Outlook data file.
• Outlook and Office 365 sync issues can be frustrating but are almost always fixable.
• We have shared five manual methods in this blog to resolve the Outlook syncing errors.
• Once you have completed the steps to fix Outlook sync errors, kindly check if the error has been fixed or not.
• Users can also try its free demo version in their system and process the first 50 items from each folder freely.

For persistent problems, rebuild your Outlook profile or use FixTechGuide’s free diagnostic tools to automate detection of authentication and IMAP errors in seconds. These syncing problems usually happen because of issues like a damaged Outlook profile, poor internet connection, or a corrupted OST file. If restarting Outlook or fixing the profile doesn’t work, converting the OST file is often the next step. EdbMails OST to PST Converter can help in these cases by recovering data from the inaccessible OST files and restoring them without data loss.

Fix Outlook Stuck on Loading Profile (2025 Guide)

This tool also helps users fix Outlook syncing issues by repairing OST or PST files and syncing the data smoothly. Here, we will discuss the five manual methods to fix sync issues in Outlook or OWA. Before finding solutions, we suggest that users check their internet connection. Sometimes, Outlook sync mailbox not updating on IMAP issues can arise because of poor internet connection. If you are still facing this issue, kindly follow the solutions below to fix the sync issues in Outlook.

Step 3 – Enable Cached Exchange Mode

This blog talks about the causes behind Outlook synchronization errors and a few solutions to fix Outlook sync issues. We have shared inbox repair tool alternative five manual methods in this blog to resolve the Outlook syncing errors. Apart from this, we also discuss the Shoviv OST to PST Converter Tool, a professional way to repair, recover, and convert Outlook data files.



There are various methods to resolve the Outlook sync issues, including manual and third-party solutions. Firstly, we will discuss a few manual methods to resolve this Outlook error and share the stepwise procedure of each method to successfully fix synchronization issues. Now, let us start with the manual processes to fix Outlook syncing errors. Outlook and Office 365 sync issues can be frustrating but are almost always fixable. Start with basic network checks, enable Cached Exchange Mode, and repair your data files if needed.

In this FixTechGuide tutorial, we’ll explore the causes and give you clear, step-by-step solutions to fix it fast. Users can also convert OST files into various file formats, including PST, HTML, EML, MSG, vCard, etc. It also provides the option to export the Outlook OST file into Office 365 and Live Exchange mailboxes.

Mailing Address

By following these methods step-by-step, you can restore full email synchronization without reinstalling Outlook. FixTechGuide continues to help users resolve Outlook and Office 365 errors quickly and safely. Incorrect Outlook settings can also be one of the reasons behind Outlook synchronization errors. This issue usually happens when Outlook cannot properly connect or sync with your mail server.



Once you have completed the steps to fix Outlook sync errors, kindly check if the error has been fixed or not. Download the tool from Microsoft and run the Outlook diagnostic to auto-detect server and account issues. There can be several reasons for the Outlook synchronization error. Before we know the solutions, we will understand a few common causes of the Outlook sync problem.