Announcing Period 2 Exchange 2016/2019 Extended Security Update (ESU) program (opens in new tab)

While both Exchange 2016 and 2019 are out of support since October 2025, some of our customers who needed more time to finalize migrations to Exchange Subscription Edition (SE) have opted to enroll into the Extended Security Update program. That ESU program started in October 2025 and is ending in April 2026 (“Period 1”). As end of April 2026 nears, some of our customers told us that they needed additional time to finalize their Exchange 2016/2019 migrations. Today we are announcing that we c...