How to fix the wrong number of unread emails flag in Outlook?

I have an annoying problem in Outlook 2013. My inbox is flagged with "1" unread message, but this is not the case. Even when I empty my inbox folder, this bold "1" stays next to my folder, new as it contains a new message.

I've tried to "empty" it, to "clean" it, to "mark all as read" it. Nothing works.

Any tips?

Solution 1:

Following works for me.

1. In the “Search Current Mailbox (Ctrl+E)” box, type: read:no and hit Enter.
2. When it shows “Find More on Server” link, click it. Then the unread email(s) should appear.

EDIT: Works with Outlook 2016 as well

you can see the image reference for your further help.

Solution 2:

I've managed to fix this by going to the web access, right-clicking the problematic folders and selecting "mark all as read". After this, Outlook stopped displaying wrong unread messages count.

Solution 3:

Run

outlook.exe /cleanviews

This cleans the internal viewstate and should resolve the problem.

WARNING: Running this command will also reset any custom views!

Solution 4:

I tried "marked all as read" at first and it did not work so I disabled the "Use Cache Exchange Mode" then "marked all as read" and bingo!

I later re-enabled "Use Cache Exchange Mode"

Solution 5:

I haven't tried the "outlook.exe /cleanviews" command, but I fixed my Outlook by disabling Cached Exchange Mode and then re-enabling it.

You can set it under your Account Settings. There's an option of "Use Cached Exchange Mode"