Hi there This issue might by old as Exchange 2007 RTM is out. I have installed latest Exchange Beta 2 on a Windows 2003 R2 server in our test lab. This is like 4th time I have done and reason behind this is the problem I am having. The IIS work process seems to be crashing all the time, specially I re-configure the OWA to work on a form based authentication method. After this, the OWA just stops working and on the server there is a message saying "IIS work process has stopped working" or something, which is quite a common error message. I have not been able to resolve this and that has caused a lot of problems. I will appriciate if someone can help me with this. Dhaval