Exchange 2019 Invalid Product Key 🔖

I’m currently running into an issue while trying to license an installation. Every time I enter my product key, I receive an "Invalid Product Key" error message. Environment Details: Version: Exchange Server 2019 (Standard/Enterprise) Current Build: [e.g., Cumulative Update 13]

Get-ExchangeServer | fl Name, Edition Restart-Service MSExchangeIS exchange 2019 invalid product key