1. A method for managing access to a secure exchange environment managed by an intermediate business entity through a user email identity, the method comprising: establishing a secure exchange server hosted by an intermediate business entity, wherein communications and access to a collection of files established by a first business entity are managed for a second business entity; and establishing an email effectivity facility that allows a user of the first business entity to specify a condition for email-based access to at least one resource in the collection of files, wherein the condition expresses (a) an effective period for using an email providing access to the resource and (b) a condition of email access to the resource by a designated individual of the second business entity, wherein the access permission was assigned using a specific email address of the designated individual.