sami.s wrote:

Well that is weird to me that you are not able to change the what you
want to keep as your default calender

You certainly can do this, but you change ALL your default folders, since
you're actually choosing a default *data store*. All of Outlook's default
folders are kept in the same data store, so changing the default calendar
also changes the default Inbox, Tasks, Contacts, etc.

or at least choose this any
calender to come in to view by default when opening the calender from
outlook.

You can certainly do this as well, even with a non-default calendar. You
can have Outlook start up displaying any folder you like in a POP or
Exchange data store. You can't make an IMAP or HTTP account folder the
startup display folder, but otherwise, nothing stops you from choosing a
non-default calendar as the startup folder.
--
Brian Tillman