Get-ExchangeServer | fl IsLicensed, EvaluationEndDate
: When copying the key, ensure there are no trailing spaces and that hyphens haven't been replaced by em-dashes by clipboard formatting. Permissions exchange 2019 product key invalid
The keys are alphanumeric and easily confused (e.g., the letter B and the number 8 , or G and 6 ). Get-ExchangeServer | fl IsLicensed