I have selected to group by subject and sort by subject as shown in this example:
The issue is that Outlook is not grouping by the contents of the Subject field, it is grouping by the contents of the Thread-Topic field. Both Android and iPhone e-mail clients updated the Thread-Topic field to...
It appears that Outlook 2010 sorts and groups headers using the Thread-Topic field when you click on the Suject field column header instead of using the actual Subject field. This may not seem like an issue, however it turns out that Outlook does not update the Thread-Topic field when you...
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