wrote:

In order to solve my problem, I would need to be able to 1) define the
inbox of the "connector folder" as default as mailbox for outgoing
messages and 2) define the calendar and contact folder of my "personal
folder" as default. In this way, ActiveSync would still synchronize my
contacts and calendar.

Unfortunately, this isn't possible. By definition, the delivery location
defines which folders are the default folders. It's all or nothing.
However, there are third-party sync tools that can work with multiple
folders. This is one: http://www.chapura.com/pmp_wm.php

However, I am not sure whether maybe the following is possible:
3) can I set up an outbox in my "personal folder" and still send my
emails via lotus notes (with or without connector?)

Sorry, I don't have enough familiarity with the Lotus Connector to say. If
you use a POP account for mail delivery, however, you can make your outgoing
address appear to be whatever you want and if you choose the address that
matches that of your Lotus mailbox, your recipients will see the messages as
coming from that address. I don't know if it's practical for you or not,
however.

4) can I transfer my contacts and calendar entris from the "personal
folder" to the "connector folder"? but I am concerned that this is
less safe (I am so far only familiar with .pst files I back up
regularly) = by the way: the backup file of the connector folder has
the ending .nst (???)

Does Lotus Notes have a calendar? If so, you should be able to drag the
contents of yoru Personal Folders calendar to the Lotus calendar, and the
same for the Contacts folder. You don't copy the folders themselves, just
the contents.
--
Brian Tillman [MVP-Outlook]