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.