I'll qualify this question with a statement that I am NOT a network guy. I subcontract all substantial configuration settings to our office Ciscos 5505 units to someone who knows what they're doing.
Three years ago, some our guests in Office A were having trouble connecting their respective VPN client programs to their respective VPN servers (Cisco, Netscreen, Sonicwall, Checkpoint ...). My Cisco subcontractor at the time made some configuration changes to our ASA 5505 and the connectivity issues largely went away. It's important to note that the configuration settings made by my subcontractor had nothing to do with the VPN server functionality of the Office A ASA 5505. That was working fine. Instead, the configuration settings were simply designed to make Office A "friendlier" to VPN clients within our office attempting to connect to other VPN servers.
Segue forward three years. Some our guests in Office B are running into the same issues. My old Cisco subcontractor is unreachable, my new Cisco subcontractor is asking me what the old subcontractor did, and I, candidly, am not sure. I suggested that he poke around on the Office A ASA to try to determine what the old subcontractor did, but I'm not sure where he should poke.