Fix Synchronization Issues Between OST and Exchange Server

Critical synchronization failure occurs when the OST file becomes oversized and therefore loses the ability to communicate with the server. Ultimately, these issues make the interface look functional but are fundamentally disconnected. This requires them to repair or rebuild the cache to restore order. Read the blog carefully to understand everything you need to know to fix the synchronization issues between the OST and Exchange server. If there occurs an OST file corruption, then resolve it with a professional tool, the Cigati OST Recovery Tool. Let’s begin the blog.

London resident Michael Green asks: “I’m Michael Green. My Outlook OST file has stopped syncing properly with Exchange Server. I’ve tried basic fixes, but still see missing emails and calendar entries. I’m looking for a reliable solution or tool to repair the OST and restore sync. Any advice?”

Why Synchronization Is Required?

Synchronizing the data is important for maintaining accurate and updated information across multiple platforms. Below are the reasons why it is required:

• Data Reliability: Synchronization keeps the same information accessible across platforms.
• Avoids Data Inconsistencies: With proper syncing, systems eliminate duplicates caused by simultaneous edits.
• Enhances Collaboration: Supports seamless teamwork with instant modifications across users.
• Safe Backup with Data Accuracy: Regular synchronization keeps the updated backup at all times.
• Anywhere, Any-Device Access: With syncing enabled, users can access the same updated data on all devices. 

Reasons for Sync Issues Between Outlook and Exchange Server

The sync issues arise due to multiple configuration-related and technical factors. Take a look at the reasons why there are sync issues:

• MS Outlook will not sync properly if there are network interruptions during the communication.
• If Outlook’s data files get corrupted, this can block proper synchronization of the email data. 
• Older versions of Outlook or Exchange can lead to synchronization errors when communicating with the server. 
• When the mailbox becomes oversized, it can slow down or stop Outlook from syncing completely.
• Also, if there occurs a problem with Cached Exchange Mode, Outlook may not sync properly.

With the above points, the synchronization may affect partially or fully as well.

However, these specified errors may appear in between if you face synchronization issues.

• Cannot start Microsoft Outlook.
• Cannot open the Outlook Window.
• The set of folders cannot be opened.
• The file abc.OST is not an Outlook data file.

All Outlook versions are affected by this uniformity, which occurs at times. You may also get ‘The File is not an Offline Folder File” Error but you can fix it easily.

How to Fix Synchronization Issues Between OST and Exchange Server?

Some methods will help you in easily solving this issue easily. Just follow the steps below to resolve it.

Solution 01: Maintain a Stable Connection

A stable internet connection is essential for correct synchronization. If the connection is weak, the communication between Outlook and Exchange Server gets affected. 

Look at the various solutions to check the connection:

• Open any browser and load any website to verify the connection.
• Also, open Outlook and check in the bottom-right corner for the connection status.
• Turn off and restart the network devices after a few minutes to refresh the connection. 
• You can also try and connect to a different Wi-Fi.
• Disable the temporary VPN or proxy servers to test the synchronization.
• Furthermore, go to Settings > Network & Internet > Status > Network Troubleshooter and follow the on-screen prompts. 

Solution 02: Manage Email Storage Capacity

An overloaded mailbox can significantly affect the synchronization process. It can result in sync errors and frequent delays.

The following are the steps to begin the process:

• Check the Size of the Mailbox 

1. Open MS Outlook.
2. Then, head to File > Tools > Mailbox Cleanup.
3. Press View Mailbox Size to check the mailbox size. 

• Delete unwanted emails 
• Remove large-sized attachments

Solution 03: Rebuild OST Data File

If the OST file gets corrupted, then that also creates a synchronization problem. Outlook creates a fresh copy of the email data from the Exchange Server. This often resolves the synchronization inconsistencies. 

Use the step-by-step process to begin:

1. First, close Outlook and also check the Task Manager to completely close the application.
2. Now, locate the OST file by pressing Windows + R and typing: %localappdata%\Microsoft\Outlook. Then, hit Enter.
3. Next, find the OST file linked to the Exchange account and either rename it or delete it. 
4. At last, restart Outlook. 

Solution 04: Repair OST with Inbox Repair Tool

The Inbox Repair Tool (ScanPST.exe) is offered by Microsoft. It can only fix the minor corruption of the OST file. This tool scans and repairs the file to allow Outlook to sync correctly.

Now, follow the steps below to initiate the conversion:

1. First, locate the OST file: C:\Program Files\Microsoft Office\root\Office16\ or C:\Program Files (x86)\Microsoft Office\root\Office16\. 
2. Then, search for ScanPST.exe in the folder. Double-click it to launch it.
3. After that, click on Browse and locate the OST file: %localappdata%\Microsoft\Outlook.
4. Select the OST file and click on the Start button. Once it is scanned, press Repair. 

Secured Tool to Fix Synchronization Issues Between OST and Exchange Server

The Cigati OST Recovery Tool can easily repair any type of OST file corruption and can easily retrieve your old OST files and their data. It is also known for its ability to fight synchronization issues between OST and MS Exchange Server as well. The application is one of the most advanced tools with a simple & easy to use interface. Plus, the software has a demo / free version as well, which you can just download and use from their website. The demo version basically helps you to evaluate the tool and all its features.
Note: The demo version basically helps you to preview all your data, but to save the files, you have to purchase the full version. 

Simple steps to resolve sync issues between Outlook and Exchange Server:

1. Download the tool on your system first.
2. Then, click on Open to browse the OST file that you want to repair.
3. After that, select the Recovery Mode and confirm the file details. 
4. Once the scanning process is completed, hit Save, pick the destination, and select the desired File Format.
5. At last, click on Ok to finalize the process. 

Conclusion

Users need to resolve synchronization issues between OST and Exchange Server for uninterrupted communication. Here is a detailed guide on how to fix synchronization issues between OST and Exchange server. We have mentioned both manual techniques and how to troubleshoot this issue with reliable software, the Cigati OST File Recovery Tool. So, it is totally up to you to decide whether you want to go for manual procedures or good software.

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