We recently converted our VPN from a 3000 series concentrator to an ASA5520. Out of the 60 or so folks that connect frequently, I have at least 2 that are having a recurring problem. They connect into the VPN just fine. They're able to access all resources just fine. However, at various points in time, their tunnel drops and they lose connectivity. According to the logs on the ASA5520 the reason for the disconnect for that particular person was "User Requested". When looking at the logs from the PC, there are only three entries. I'll add both the ASA logs, filtered for this user's ID, and the VPN Client log file. I've searched and found items similar to this but with no actual fixes.
BTW - We currently have the timout settings (max time, max idle) disabled. This was done as a troubleshooting measure for this.
Any help would be appreciated.