Fix Outlook Slow Performance Caused by PST File Duplicates | Quick Solutions

Has your Microsoft Outlook become painfully slow? Does it take a long time to open an email, change folders, or simply search for something? If so, you're not alone. Many users experience slow performance in Outlook, especially as their mailbox expands or become more cluttered with time.

In this guide, we will discuss the most common reasons Outlook may be slow to respond, and we will show you how to manually and automatically fix Outlook Slow Performance caused by PST File Duplicates and productivity.

Why Does Outlook Become Slow?

Outlook is a highly effective tool, but it can suffer from various issues:

· Large PST or OST files.

· Duplicate emails and calendar entries.

· Outlook add-ins and third-party integrations.

· Corrupted PST files.

· Too many emails in the Inbox or Sent folder.

· Stale Outlook or Office updates.

Knowing the cause is the first step to getting it back to optimal performance. The main cause is slow performance caused by PST file duplicates. So let’s see that hoe we can fix Outlook slow performance caused by PST file duplicates?

How to Fix Outlook Slow Performance Caused by PST File Duplicates?

There are two ways to fix Outlook Slow Performance caused by PST File Duplicates.

1. Manual method

2. Automated method by using our SysTools Outlook Duplicate Remover.

Let us see how we can use the manual method to fix Outlook Slow Performance.

Manual steps to fix Outlook slow performance

1. To organize your Inbox, Sent, Contacts, or Calendar, sort by Subject, From, or Date.

2. You can manually sort and delete duplicates, just select emails, contacts, or calendar entries and delete them.

3. You can use the Clean Up tool built into the program: In your inbox, go Home > Clean Up > Clean Up Folder.

4. You can also check and edit your email rules: Go to File > Manage Rules & Alerts to find out if the duplication was rule-based.

5. You can sort your contacts by name or by email and delete the duplicates.

6. You can sort your calendar by date or by subject and delete the duplicate entries manually.

7. If you use a POP3 profile, be sure that you are not syncing the same account to multiple devices.

8. It's always best practice to archive or back up your previous data before deleting anything.

Limitations of the Manual Method

The manual method is free and simple, but it has several limitations that may make it difficult sometimes. Here’s a list of the limitations to fix Outlook slow performance caused by PST file duplicates by the manual method.

1. Scans are slow and very tedious work when searching through every folder and looking at duplicates and deleting them.

2. There is no built-in way to find duplicates and delete them in bulk.

3. It could result in users deleting different records by mistake, or simply deleting a valid item, inadvertently creating data loss.

4. Manually searching records can overlook duplicates, which are very similar but may have subject lines or timestamps that are slightly different.

5. The functionality is not suited for large PST files and accounts with hundreds of thousands of items.

6. There’s no way to find duplicates if they’re stored in multiple folders or across multiple mailboxes.

7. There’s no way to even filter on detailed specifications like what was attached, what their sizes were or what information the sender provided.

8. No way to see what was deleted, making it impossible to track what is deleted or ever verify what was deleted.

9. There’s no way to manage duplicates if you had to do it across multiple PSTs manually.

10. Cleanups can only be done manually; you could never schedule cleanups.

If you want to prevent these limitations, use an automated method by using SysTools Outlook Duplicates Remover!

What is SysTools Outlook Duplicate Remover?

SysTools Outlook Duplicate Remover is a tool designed to help users identify and remove Outlook duplicate calendar events, contacts, emails, tasks, etc.

This software scans your Outlook data and fix Outlook slow Performance based on specific criteria such as date, venue, events, etc.

It helps corporations to eliminate the problem and fix Outlook slow performance caused by PST file duplicates

Once the duplicates are identified, you can choose to delete them in bulk.

Key Features of SysTools Outlook Duplicate Remover:

1. Comprehensive Outlook Duplication

The software recognizes all duplicate items in Outlook, including:

• Emails

• Contacts

• Calendars

• Notes

• Journals

• Tasks

2. Multiple Matching Parameters

Select how you wish the duplicates to be matched by:

• Sender/Received information

• Subject and Internet headers

• Attachment names.

• Sent/Received date.

• Contact fields (name, email, phone).

3. Multiple Output Options

• Create a new PST with the deduplicated information.

• Remove duplicates from existing items.

• Maintain folder hierarchy and integrity.

4. Bulk Processing

Great for corporate IT departments, you can import more than one PST/OST file and deduplicate in bulk.

5. Safe & Fast

Many businesses continue to bypass duplicate contacts in Outlook because they fear losing their data. SysTools has ensured these can be operated safely without compromising the data.

Steps to use SysTools Outlook Duplicate Remover

Here are the following steps: -

1. Install and launch the SysTools Outlook Duplicates Remover.
2. Now, add the PST files, and click on the Add Files or Add Folder button.
3. Click on Open to add the selected PST file.
4. After that, either select Within Folders or Across Folders and then click on the Next button.
5. Now, click on the Destination option if you want to save the file in a different destination.
6. Then click on the next button.
7. Now, choose the select items type option, and there you select only the contacts.
8. If you want to apply filters, you can add or remove them by clicking on Specify duplicate criteria.
9. According to your preference, add the filter you want and click on save button.
10. Click on the Next button to start the process of removing duplicates from PST files.
11. Once all the task is done, click on the home or close button.

Benefits of Using SysTools Outlook Duplicate Remover

· Easily scans and identifies duplicate contacts, emails, calendar items, and more based on multiple matching criteria (Subject, Sender, etc.).

· By removing duplicates and squeezing down the size of your PST file, you can speed up Outlook performance and reduce the number of application crashes.

· By letting you add and process multiple PST files at once, it can significantly help save time when dealing with very large or multiple accounts.

· Will keep your original folder structure intact, and it all but guarantees that you will have no important data loss during the removal process.

· Filters are available based on date, folder, and fields, so you have total control of which duplicates you may want removed.

· Can support both ANSI and UNICODE PST files, since it is compatible with Outlook 2021, 2019, 2016, and older versions as well.

Conclusion

SysTools Outlook Duplicate Remover is a great solution to remove and fix Outlook slow performance caused by PST File duplicates, calendar events, emails, and tasks. Through the steps mentioned in this article, you can easily fix Outlook Slow Performance caused by PST File Duplicates and maintain your Outlook in proper order.

Remember to scan your Outlook regularly to avoid duplicate problems. With SysTools, managing your Outlook data has never been easier!