1. Find the script CreateDatabase.sql that will be in the server installation folder. "C:\Program Files\Quest\Active Administrator\Server" by default.
2. Search for the line "CREATE OR ALTER PROCEDURE [dbo].[GetCertificateExtensionsForComputer]"
3. Remove "OR ALTER" so it reads "CREATE PROCEDURE [dbo].[GetCertificateExtensionsForComputer]"
4. Save the script and run the configuration wizard again.