A. See the previous FAQ. IMAP is exactly the same as POP3 from a service perspective—it's installed but not started by default. Make sure IMAP is enabled for the user then set the IMAP service to Automatic, Microsoft Exchange IMAP4.
You can also make these changes from PowerShell with these commands:
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Check out hundreds more useful Q&As like this in John Savill's FAQ for Windows. Also, watch instructional videos made by John at ITTV.net.