I have a multi site customer. All sites are ip500V2. Some sites are still at 8.1 others are at 9.0 and 9.1. They are connected via MPLS and H450 trunks not SCN. I have Admin suite 9.1.5 build 145 loaded at the main location. I can access all sites via Manager & System status from the main location. I cannot access any site from the main location that is 9.0 or 9.1 with Monitor. I could not connect monitor with the 9.1 service pack 4 either. Only thing I haven't tried is uninstalling the Admin suite and doing a fresh install. Might be worth a try. Any suggestions?