Hi, i have just upgraded the Exchange 2013 from CU18 to CU21.
I downloaded the CU21 and run the setup file. The setup has been completed successfully however i found on one of article that before update we must prepare "Perform AD Schema and Domain Preparation for Exchange 2013 CU21" and i missed this step.
Is any one know what would be a impact and how i can fix this issue? Thank you in advance