Case Study: Four Communications achieves rapid, no-loss email migrations during frequent M&A with Mimecast

Mimecast Helps Global PR Agency Four Communications Ease Email Transitions in Wake of Frequent M&A Activity

Four Communications, a London‑headquartered integrated PR agency grown to 330+ people largely through acquisitions, faced a recurring IT challenge: moving hundreds of new employees onto its email system quickly and without losing historical mail after acquiring companies at a rate of 1–3 a year. Because email is the firm’s primary communications channel, migrations from a mix of platforms (Exchange 2003/2007/2010, Office 365, Google, etc.) had to be fast, seamless and risk‑free.

Using Mimecast’s cloud email security and archiving services, Four’s IT team follows a checklist (domains, delivery routing, MX changes and address alterations) to complete migrations in a few weeks; employees get access to their new inboxes before cutover and their historical email is preserved in the same folder structure. The Mimecast routing also lets Four accept mail for legacy domains without exposing or managing them in Exchange, resulting in faster onboarding, no data loss and a cleaner, easier‑to‑manage email infrastructure.

Four Communications

Jake Fraser

IT and Operations Director