How to Fix “Why is My Outlook PST File Not Syncing with OneDrive”?

Introduction
Are you searching for why is my Outlook PST file not syncing with OneDrive? In this blog, we will understand why this happens and get practical ways to fix it, including how using a software solution can help. We understand, When Outlook PST file refuses to sync with OneDrive, it can feel like emails get stuck. This issue is quite common, especially for users who rely on Outlook based Personal Storage Table (PST) files to manage large volumes of emails.
A PST file is basically a local database supported by Microsoft Outlook to store emails, contacts, calendar, and attachments. While OneDrive is designed for seamless cloud synchronization, PST file does not always go well with it. Why? Because PST file is large, and does not support real-time syncing. There can be an instance where a small update in Outlook can cause the entire PST file to change, which OneDrive then struggles to sync efficiently.
Why is My Outlook PST File Not Syncing with OneDrive? Common Reasons
File Size Issues: PST files can become a quite large in size, making synchronizing slow.
Regular Updates: Outlook continuously updates PST files, interrupting OneDrive sync cycles.
File Locking: Outlook locks the PST file while it’s in use, preventing OneDrive from accessing it.
Corruption: A damaged PST files may fail to sync.
Outlook PST File Not Syncing with OneDrive? Quick Fixes You Should Try First
Option1. Pause Outlook While Syncing
Close Outlook completely and allow OneDrive to finish syncing the PST file. This prevents file locking conflicts.
Option2. Move the PST File Out of OneDrive
- Instead of keeping the active PST file inside your OneDrive folder:
- Move it to a local directory
- Keep only a backup copy in OneDrive
Option3. Check OneDrive Sync Status
Make sure OneDrive is running properly:
- Restart OneDrive
- Check for sync errors
- Ensure you have enough storage space
Option4. Repairing a Corrupted PST File
If corruption is the issue, you can use Outlook’s built-in Inbox Repair Tool (ScanPST.exe):
- Locate ScanPST.exe on your system
- Select the problematic PST file
- Run the repair process
- Restart Outlook and try syncing again
- This works well for minor corruption, but not always for severe damage.
How a Software Solution Can Be the Best?
If basic fixes don’t work, try CubexSoft PST Converter it can be an extremely useful solution for users. The tool can handle PST files seamlessly and can resolve both syncing and corruption issues. The software is a professional way that converts PST files into other formats such as: EML, MSG, MBOX, PDF, Office 365 etc.
How to Resolve Outlook PST Files Not Synchronizing on OneDrive using Software?
Here’s a general step-by-step approach:
Step1: Install the Reliable Outlook to OneDrive Converter.
Step2: Add the Problematic PST File: Load your PST file into the software.
Step 3: Preview the Data: The tool lets you preview emails, attachments, and folders before conversion.
Step 4: Choose Output Format: Select any format like EML, MBOX, or Office 365 for direct export to for cloud usage
Step5: Start Converting: Click on the Convert to start migration.
After conversion, you can store emails in formats that OneDrive handles better, avoiding sync conflicts.
Benefits of the Software
- Allows migration to cloud platforms as the tool supports cloud-friendly formats
- You can migrate your data directly to cloud-based services like Exchange, Office 365, etc.
- The tool runs on Windows Operating Systems and Mac Operating Systems.
- Free demo edition of the tool makes it feasible migrating 25 emails without any cost.
What are the Preventive Measures to avoid PST OneDrive sync issues in the future?
- Avoid storing active PST files in OneDrive folders
- Regularly back up of PST files manually is a good practice
- Keep the size of PST file manageable
- Use archiving instead of letting one file grow indefinitely
Read more
How Do I Recover Archived PST Emails in Outlook
Let’s Sum Up
PST files not syncing with OneDrive isn’t just a minor inconvenience; it’s a structural mismatch between how PST files work and how cloud syncing operates. While quick fixes like closing Outlook or moving files can help, they don’t always solve all issues. In that case it is advised to opt for the suggested converter, which is a prominent solution to all your issues related to Outlook PST files. It not only resolves syncing problems but also streamlines how your email data is stored and accessed. The suggested software is easy to use and able to provide you a quick way to tackle why is my Outlook PST file not syncing with OneDrive. Users can opt for the free trial of the software, which is feasible with 25 emails from PST.
