Are you clustering (two or more ArcGIS Servers in, say, a "Default" cluster) servers across a WAN backbone? E.g. Round-robin, with one server in one city, and another server,....in another city. All communicating on a private fiber circuit. We have an issue (numerous, actually) with the second server in the cluster, and I've been informed by ESRI tech support that clustered servers that ARE NOT on the same LAN....is not supported by ESRI. Has anyone else experienced this? I'm a bit skeptical.......