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Check the Enabled box
Enter a password
Reenter password
Click “Save Changes”
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Submit a request to WPEngine asking them to disable caching for the Password Protected cookie associated with the site. You’ll find that under My Site > Choose your site > Settings > Password Protected > Help
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You can request this via WPEngine’s chat feature. After they’ve disabled caching for the cookie you sent them, you will see it listed under Production (livechhs) > Cache > Exclusions > scroll to bottom of the list
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