How to Clear Outlook Cache to Fix Sync Issues

How to Clear Outlook Cache to Fix Sync Issues

Clearing the Outlook cache can fix problems like missing emails or sync delays.

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Step 1: Close Outlook

• Make sure Outlook is completely closed.

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Step 2: Delete Cache Files (Windows)

1. Press Windows Key + R and type:
%localappdata%\Microsoft\Outlook

2. Delete the .ost files (these will be recreated when Outlook restarts).

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Step 3: Delete Cache Files (Mac)

1. In Outlook for Mac, go to Tools > Accounts.

2. Select your account and click the – sign to remove it.

3. Re-add the account — this clears the cache.

✅ Outlook will rebuild the cache and resync with your mailbox.

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