consider tuning the text "mailbox must be installed" for example to "mailbox must have been installed and created" when user starts to create email addresses.
Why?
The following happened:
(1) created mail user x
(2) tried to create email address y to user x
(3) failed, user x was not in the list to pick
(4) checked all mail users, x was in the list
repeated (2) ... (4) without succeeding
took coffee break
(5) message "mail user x created" on display
succeeded in (2)
Obviously there is delay before the mail user is ready to be used for email address creation and therefore server software should display somethink like "you must install mail user and also wait until everything has been created before you start using it for email addresses"
Note that when the server lists domains to be picked for the email address, you really can see all the domains created whereas when it lists mail users for picking one it may not be in the list allthough you have created it.
text2tune4mailboxinstallation
Keying in email users and email addresses does work, also with smart phones - you just have to wait for "mail user created" messages before you start keying in email addresses - wait time seemed to depend on the selected mail derver.
i.e. no need to change the current software, search feature would be welcome addition.
thanks Sean, I'll pass your advice to our guys!