Reggie,
6600 messages in 4 1/2 hours is about 2.45 messages per second on average. If the timestamp is 1 second apart, it should take almost 2 hrs to process all the messages. I was expecting to see messages rejected or someother type of errors that would count for the slowdown.
The slowdown must be somewhere in one of the boxes and not in the interface itself.
Maybe the Windows box is not fast enough to generate the records. I’m sorry I’m not familiar with the HMM-Admin RX integration.