Outlook 2010 read icon stays yellow (instead of turning gray) even after reading emails

I'm having a problem with outlook 2010.

Usually when an email is read, it gets grayed out and the message icon changes too (The envelope icon changes from yellow to grey).

After importing some email from another account, this doesn't happen any more.
The email get grayed out, but the icon with the yellow envelope stays the same and that makes it difficult to distinguish read/unread emails.
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kostbadAsked:
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kostbadAuthor Commented:
I'm uploading an example to make it easier to understand.

I always see the yellow envelope icon, even in read email messages, even though i should be seeing the gray one.
gray.jpg
yellow.jpg
Andrew LeniartIT Consultant & Freelance JournalistCommented:
Hi kostbad,

Can you please try this:

I found the solution when I went to Outlook 2010 Menu File > Options > Add-Ins > Manage (bottom of window) > select radio button and choose 'Disabled Items' then select 'GO'.

I saw that one of the disabled items was 'Reading Pane'. I enabled it, restarted Outlook and email read status problem was fixed.

Source: https://answers.microsoft.com/en-us/msoffice/forum/all/outlook-2010-email-read-status-not-changing/ad77b531-57e2-4d26-b3f4-73abbda3dc88

Exit and restart Outlook after performing the above.

Regards, Andrew
Andrew LeniartIT Consultant & Freelance JournalistCommented:
If the above doesn't help, please also try using Scanpst.exe over your Outlook .pst file to ensure there are no errors.

A good article on how to use ScanPst is linked below.

https://www.howto-outlook.com/faq/usingscanpst.htm

Hope that's helpful.

Regards, Andrew
Andrew LeniartIT Consultant & Freelance JournalistCommented:
As a final step, try a repair install on your copy of Office 2010. In the add/remove programs section of Windows, click your office installation and then click Modify - use the repair function.
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