The strange thing I notice is that both the script and my stored procedure are run against the same server and they show me different results. I'm using the same credentials (sysadmin) to run both the procedure and the script (using windows autentication) so the security context is the same too. So why the resultset is different?

In other words

RegisteredServers.Count (equals 8 in the script)

EXEC @intReturnCode = sp_OAGetProperty @intRegisteredServers, 'Count', @intServerTotal OUTPUT (equals 1 in the stored procedure

Why?