Ok, today I got something to laugh about for you guys out there. I don't know why it hasn't happened before, but this week was the first time I had to create a CRM queue on a new 3.0 system. So what I did was to grab my copy of CRM Installation and configuration course documents and proceed the mentioned step by step instructions. I created the user, set the correct privileges and attributes, disabled the user account and added the queue in MS CRM application. Finally I sent an email to the queue ... but nothing happened. So I checked the event logs on both Exchange and CRM servers. But there were no entries in there. After some NG and google research I played around with user privileges and registry keys, but still nothing happened. Because I had restarted IIS, Exchange Router service and Exchange itself several times, the system administrator got mad at me because MOM (MS Operations Manager) was driving him crazy with alert messages. :-)
Of course I checked the procedure to add a queue several times, and I did it exactly as stated. In a sudden inspiration I checked the official Implementation guide and found the solution: as a last step you have to add mailbox rules to your queue user using the rule deployment wizard. It's that simple.
There are 2 reasons why I post this here: 1. maybe there is someone out there who is also relying on the offical course documents and encountering the same situation. Hopefully he reads this and saves some time. 2. it's another lesson for me: never trust information - even if its printed and packed in a fancy white ring binder with happy looking people on the cover. :-)