1. A method for managing access to a secure exchange environment managed by an intermediate business entity, 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 to allow conditional secure access to resources of the collection of files by individuals of a second business entity different than the first business entity; and establishing an email effectivity facility, managed by the secure exchange server, that allows a user of the first business entity to specify conditions for email-based access by a designated individual of the second business entity to at least one resource in the collection of files of the first business entity through an embedded link in an email message provided by the email effectivity facility to the designated individual of the second business entity, wherein the conditions include (a) an effective period for using the embedded link to provide access to the at least one resource and (b) an event condition of email access to the resource by the designated individual of the second business entity, wherein an access permission is assigned using at least one individual user email identity including at least one specific email account of the designated individual of the second business entity, and wherein the email effectivity facility provides access confirmation to allow access to the at least one resource if the conditions are met.