FIXED: "ERROR: Could not create the order."; While testing (thanks to Roger, Julian, Erik and Andrew) we saw that updating the script wasn't always the complete solution. Specifying the parameter "-CleanPoshACMEStorage" after updating the script helped fixing this issue completely. This will cleanup the %LOCALAPPDATA%\Posh-ACME directory.
NEW: Version check to notify you if there is a new (dev) version available
CHANGED: Removed the verbose logging; I didn't liked the output to screen. Therefore I added a logging function to write everything to a log file. Resulting in a cleaner output to the screen. Specifying the "-Verbose" option has no particular use anymore.
CHANGED: Overall speed; Changed internal process of configuring the Citrix ADC thus improving the speed.