I've built a new NT domain (both PDC and BDC are NT4 Server with SP6a and incidentally, clustered). For some reason, one of my users on our existing Novell 4.11 network (running NT4 Workstation with Sp6a and in a Workgroup only) is getting messenger service messages from the BDC regarding confirmation that replication has completed successfully. Now, why this non-administrative level user existing outside of this NT domain is receiving these messages is an absolute mystery. I have checked the properties of both PDC and BDC in Server Manager and specified Alerts to be sent to my username in that domain and no-one else. Can anyone offer any pointers? How exactly does the Messenger Service interact with NT Server administrative alerts? Microsoft's website and Technet products barely give a three line overview and that's it.