Exchange 2019 Product Key Invalid May 2026

Set-ExchangeServer -Identity "YourServerName" -ProductKey "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX" Wait 30 seconds, then restart the Exchange Management Shell and run:

Get-ExchangeServer | Format-List Name, Edition, ProductKey* If it shows ProductKeyPresent : True , success. Sometimes the graphical EAC fails while PowerShell works. Use the same Set-ExchangeServer cmdlet. If that fails with a licensing error, run: exchange 2019 product key invalid

if ((Get-ExchangeServer).IsLicensed -eq $false) Set-ExchangeServer -Identity $env:COMPUTERNAME -ProductKey "YOUR-KEY-HERE" -ErrorAction Stop Restart-Service MSExchangeADTopology exchange 2019 product key invalid