Holy cow, I wrote a book!
It's a widespread convention that the
Ctrl+F keyboard shortcut
initiates a Find operation.
Word does it,
Excel does it,
Wordpad does it,
Notepad does it,
Internet Explorer does it.
But Outlook doesn't.
Why doesn't Outlook get with the program?
Rewind to 1995.
The mail team was hard at work on their mail client,
known as Exchange
(code name Capone, in keeping with all the
Chicago-related code names from that era).
Back in those days, the Ctrl+F keyboard shortcut
did indeed call up the Find dialog,
in accordance with convention.
And then a bug report came in from a beta tester
who wanted Ctrl+F to forward rather than find,
because he had become accustomed to that keyboard shortcut
from the email program he used before Exchange.
That beta tester was Bill Gates.