Before installing, ensure your environment meets these 64-bit architecture standards: Cumulative Update 15 for Exchange Server 2019 - ALI TAJRAN
: Modern distribution for volume licensing has moved from the legacy VLSC to the Microsoft 365 Admin Center Volume Licensing Service Center (VLSC)
You can find the official ISO in one of three places depending on your license type: Volume Licensing Service Center (VLSC): Most common for enterprise organizations. Sign in to the VLSC portal to find your licensed downloads. Microsoft 365 Admin Center: