I am currently facing performance issues in Outlook, such as slow startup, frequent freezing, and delayed email searches. After checking my system, I found that my Outlook PST file has become very large because I have been using the same mailbox for several years and have stored a lot of old emails and attachments. How can I optimize Outlook by compressing PST files safely without losing any emails, folders, or attachments? I am looking for a reliable and simple method that works for large PST files and does not affect data integrity. If anyone has already faced a similar situation and successfully reduced the PST file size to improve Outlook performance, please share your experience and recommended steps.