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Hi there! Tawny from Moz's Help Team here! Typically requiring a password to access certain pages on the site will prevent our crawler from reaching them, but if those pages are linked to somewhere else on your site, it's possible for our crawler to still find those pages. This sounds like it might be pretty specific to your Campaign, so I would encourage you to contact us at help@moz.com and we'll do our best to sort through this with you. Thanks!