My Outlook PST file has become extremely large because of a huge number of duplicate emails that were created over time due to multiple imports and synchronization issues. Now Outlook is running very slowly and sometimes even crashes while opening the mailbox. I am looking for a safe and reliable way to remove duplicate emails from my PST file without affecting original messages, folder structure, or attachments. What is the best method to clean duplicate items from a large PST file while keeping the data intact and avoiding any risk of corruption?