Why is the title of your post, "Client VPN split tunneling?"
 
I have split combined networks and combined them again and not seen any service interruption or other trouble.  I did this most recently to get rid of an old demo MC network I had in one of my combined networks.  If anything, you *might* lose historical data like client usage.  If that is important, I would call support or research more to find out.
 
 
					
				
			
			
				
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