Exchange 2019 Product Key Invalid !!install!! <Top 50 REAL>

w32tm /resync

Set-ExchangeServer -Identity "EXCH01" -ProductKey "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX" exchange 2019 product key invalid

Wait 30 seconds, then restart the Exchange Management Shell and run: exchange 2019 product key invalid

Reset the licensing state:

can be used to upgrade from Standard to Enterprise without a reinstallation. KMS/MAK Confusion exchange 2019 product key invalid