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You can't assign color categories for IMAP accounts in Outlook 2016

Original KB number:   4498585


You can't set color categories on email items that are associated with an IMAP email account in Microsoft Outlook 2016.


The ability to assign color categories is not available for IMAP email accounts in Outlook 2016. This is a limitation of the color categories feature.


To work around this issue, add your email account as a POP3 account. POP3 accounts do support assigning color categories.

Alternatively, if you are using an or Microsoft 365 email account, see Add an email account to Outlook to make sure that you connect in a manner that provides the full benefits of those accounts.


For more information about how to create and assign color categories, see Create and assign color categories.