What the difference between the IME and IDM, I think the IME is the replacement of IDM and IDM was compatible with previous version of IPS IOS.??? please correct me if i m wrong. I m very much new to IPS.
As Marcin indicated, IDM is for single device management and IME supports up to 10 IPS sensors.
IPS Device Manager (IDM) is built-in to all current sensor software releases. It supports device configuration and manual event monitoring.
IPS Manager Express (IME) is a stand-alone Windows application that can manage up to 10 IPS devices in the current release (7.0.3). IME can provide real-time event monitoring for most IPS releases (5.1, 6.0, 6.1, 6.2 and 7.0). It is not necessary to run the IME GUI full time as the event collection process runs as a Windows service which collects the events via SDEE from the managed sensors and stores them in a local MySQL database. As the events are stored in the local MySQL database, historical reporting and auditing may be performed against that data. IME will cross-link to supporting signature event details from the Cisco IntelliShield site. IME can also handle IPS configuration for IPS recent IPS releases (6.1, 6.2, 7.0).
IME is not replacing IDM, it provides the ability to manage multiple IPS sensors through one application.
IDM is just a single device manager.
While IME can manage multiple devices, collects logs, browses through them has SDEE etc etc