How do I filter mailboxes with undefined storage limits/quotas using the Mailbox Storage Information report?

I am using the Mailbox Storage Information report template and I would like to filter all mailboxes whose 'Issue warning' quota is not defined.
However, I don't know what to choose in the drop-down list.

Please set your filter as follows:

Issue warning (KB) Is greater than 1,000,000,000 (or any other very high value).

Note: You can also use this method to retrieve mailboxes whose 'Prohibit send', 'Prohibit receive' quotas or message size limits are undefined in Exchange using the appropriate filters.

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