System and method for processing messages from an external communication platform

A method for managing encrypted third-party electronic messages for an organization having a regulatory requirement to retain business-related electronic messages, the method comprising executing instructions on a processor at a server that:

• for a first user account for a first user associated to the organization, define a first message space accessible through electronic devices in communication with the server, the first message space accommodating peer-to-peer administration by users in the organization, the first message space providing facilities for
• identifying an owner for the first message space;
• retaining and preserving messages in a manner based on retention parameters associated with the organization;
• and
• creating a message channel in the first message space for messages between one or more users in the organization and one or more additional organizations;
• for a third-party communication system accessed by the server for communications with the first user,
• create for the first user a third-party user account for the third-party communication system;
• and
• for a validated the third-party user account for the first user, process a third-party communication system message sent between the first user and an external user of the third-party communication system;
• decrypt the message;
• archive contents of the message;
• and
• then encrypt again the message,
• wherein
• account privileges of the owner follow an organization policy for the organization and provide the first user with privileges in managing the first message space reflecting the organization policy;
• and
• the additional organizations associated with the first message space are peers with respect to the first organization and to each other.