I don't necessarily think this is an Exchange problem, but Microsoft Support EngineerVardhaman Shetti told me to post over here in the Exchange forums, because he couldn't reproduce the problem on an IMAP connection and I happen to be connected to two Exchange
servers on my primary machines (my desktop and laptop) and one Exchange Server on another (my wife's laptop). Exchange Servers in all cases are Exchange 2013.
However, I also don't have never seen the problem in Outlook 2010 or 2013 (any previous version of Outlook), and in the case of the Outlook 2013 computers, they were even connected to the same Exchange Servers. This problem is unique to Outlook 2016 (through
the current released version, updated earlier this month) and it's purely a display problem, but it happens on all 3 of the computers I've tested (all 3 are also Windows 10, I also have access to other systems, but they're stilling running Windows 7 and Outlook
2013, and don't have the problem):
The Folder Pane in Outlook 2016 doesn't hold its width properly when switching to the Calendar View from the Mail View, if the Reading Pane is also open/active in the Calendar view. In fact, it always shrinks to a width that is too narrow to display the
full calendar width in the little mini calendars at the top of the Folder Pane and that only fits 2 of the icons at the bottom (Mail and Calendar, People and Tasks are only reachable by clicking the ... or manually making the Folder Pane wider again. Making
the folder pane wider again works fine, until the next time I switch from Mail to Calendar view. Also, this problem is ONLY with the Calendar View. The Folder Pane in all other views (Mail, People, and Tasks) always work fine.
To reproduce, go to the Calendar view and be sure both the Folder Pane (leftmost pane) and Reading View are visible in Outlook 2016, both of which you can turn on via the View tab of the Ribbon Bar. Both of these panes should also be visible in the Mail
view, which I think is the default. I also happen to use the Week view on the Calendar (not sure if that matters). Go to the Calendar view, adjust the width of the Folder Pane to show every day of the week on the calendars at the top of the pane
and all main Navigation icons at the bottom (Mail, Calendar, People, Tasks). Then click on the Mail icon at the bottom left of the screen, then back to the Calendar. After this, 100% of the time for all 3 of my Windows 10 computers, the Folder Pane has shrunken
to only be wide enough to show Sunday - Friday (no Saturday) on the calendars and only two of the icons (Mail and Calendar) in the links at the bottom.
Note that a weird work-around is to simply not switch to Calendar directly from Mail. If you instead switch to People or Tasks, then switch to Calendar, the Folder Pane width will be preserved. The problem ONLY occurs if switching from Mail to Calendar,
and when doing that it happens 100% of the time for me.
I have also tested and confirmed that the OS screen and zoom settings don't matter. At least having the screen size be 100% or 125% both exhibit exactly the same behavior.
Any ideas? Very frustrating to have to constantly re-adjust the width of the Folder Pane on the Calendar view or disable the Reading Pane to use Outlook
Colin