Filter Company date properties by aging "more than" or "less than"

[rickm]

Contact properties can be filtered in lists and workflows to pick those where a date field is more than a certain number of days in the past or future.  But this can't be done with custom company properties. Frequently, attributes are company-level and not-contact specific, like the date a company reached a specific milestone.

For example, I want to start a workflow to all contacts at Customers, where the last Customer Site Review date is more than 90 days old.