As per screenshot below,
(I) indicating there is 67 unread mail in inbox, therefor the View pane
should show at least 67 mail/messages.
(III) only 10 mail/messages is visible (there is actually 117 total messages in reading pane)
The culprit is (II) "Filter Applied". Most of the user will miss this indicator and start panicking. Most of the standard fixes wont able to fix this , including :
-repair office apps
-office diagnostic
-refreshing and rebuilding outlook profile
-rename outlook key in Registry (i will cover this on my next post hehe..)
The Fix:
go to View > Current View > click Customize Current View.
it will open another dialog box called Filter. Click on Clear All to remove all the filters.
(as for advance users, this is the place where you can set filter according to you preference).
Click Ok > Ok to close the dialog boxes.
And now when you check back, all your mail/messages will be visible again. Check out the indicated "Filter Applies" has disappears.
see ya later!!