How to Clear Outlook Cache: A Complete Guide for Desktop and Web

• 21 June 2026
• by: Chloe Martin
• in: Server Performance
• Tags: business email, email troubleshooting, ost file, outlook
• note: no comments

Learn how to clear the Outlook cache safely: autocomplete list, OST offline file, attachment temp folder, and the new Outlook on the web. Step-by-step fixes.

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