Not really. Not unless you tell your users to stay off the guest network.
Once teh device has a profile configured, it will choose which one to join. So you can remove the Guest Wireless profile, but once they manually choose to join, it will be there again, and back to square one.
On your Guest are you doing webauth? You can configure the webauth (AAA config) to deny a 'corporate' user.
HTH,
Steve
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HTH,
Steve
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Please remember to rate useful posts, and mark questions as answered