Navigate to on the left-hand menu, then select the Servers tab.
: Ensure your key matches the edition you are trying to activate. A Standard Edition key will be rejected if you have already exceeded five databases, as that requires an Enterprise Edition license. exchange 2019 product key invalid
and in a centralized location.
Many administrators find that while their product key is perfectly valid, the Exchange Admin Center (EAC) Navigate to on the left-hand menu, then select
If you downloaded an early preview build or an evaluation ISO from an untrusted source, it might not accept retail or volume license (VL) product keys. 3. How to Fix the Error Try these methods in order to resolve the licensing issue. Method 1: Use the Exchange Management Shell (EMS) Navigate to on the left-hand menu