How to Clear Outlook Cache

Introduction

Outlook can build up a large cache over time, causing slow loading, outdated information, or syncing problems. Clearing the cache gives Outlook a fresh start without affecting your emails, contacts, or important data.

What You'll Need

• A Windows or Mac computer

• Access to your Outlook profile folders

• Ability to close and reopen Outlook

• Optional: Admin permissions, depending on work computers

Steps

Close Microsoft Outlook completely to ensure no cached files are in use.
Navigate to the Outlook cache folder:
• Windows: Press Windows + R → type %localappdata%\Microsoft\Outlook → press Enter.
• Mac: Open Finder → Go → Go to Folder → type ~/Library/Group Containers/UBF8T346G9.Office/Outlook/.
Locate the "RoamCache" (Windows) or "Outlook" cache files (Mac).
Delete the contents of the folder, but do NOT delete the folder itself.
Restart Outlook and allow it a few minutes to rebuild necessary cache files.

Alternative Methods

• Use Outlook’s built-in Reset View option to fix display issues

• Clear Auto-Complete (nickname) cache from Outlook settings

• Repair your Outlook profile using the Control Panel

• Rebuild the search index if Outlook search is still slow

What NOT to Do

• Don’t delete your entire Outlook profile folder

• Don’t clear cache while Outlook is still running

• Don’t remove PST or OST files unless instructed by IT

• Don’t force delete files if your company restricts access

FAQs

Does clearing the Outlook cache delete my emails?

No. Clearing cache only removes temporary files, not emails, contacts, or calendars.

How often should I clear my Outlook cache?

Most users only need to do this when Outlook becomes slow or shows outdated information.

Will clearing the cache fix search problems?

Sometimes. If issues continue, rebuilding the search index may be required.

This article is for informational purposes only. Always follow manufacturer instructions and use proper safety precautions. You assume all risk for any actions you take based on this guide.

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