We have a number of people that use OWA to manage some shared mailboxes.  Recently, these were migrated from Exchange 2007 SP3 to Exchange 2013, SP1

they heavily utilize the category feature on messages in the mailboxes, and occasionally need to find messages that have not been assigned a category.

In OWA 2007, they were able to use the Search function with the parameter category:[] to find these messages.

It appears that functionality is no longer present in OWA 2013.  We can search for messages that belong to a specific category, but not to a message without a category.

Also, there appears to be no way to sort a folder by category.

Has anyone encountered this and found a work-around?

Hi,

At present, "view by category" is not supported in OWA 2013. It is a feature available in Outlook. I suggest you add the account into Outlook and view items by categories.

Best Re