IMAP folders may need to be manually assigned to a Mac Mail account in order to synchronize properly. The following article explains how to find and configure this setting within the Mac Mail client.
How to Add Folders to the Subscription List in Mac Mail
Open your Mac Mail client.
In the top left corner, click on MAIL in the menu bar, then select PREFERENCES.
Click on the Account Information button at the right of the screen.
Make sure that the first item in the...
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