switching from POP3 to IMAPI do I need to change settings in Web email?

switching from POP3 to IMAPI do I need to change settings in Web email?

hi   so I am using Outlook with My Zoho mail, also have Verizon email /AOL. they no longer support POP3 and said imapi is much better, so I want to switch my ZoHo to imapai. I googled and it said i need to change it in my account....i looked at my account online and cannot find this. 
let me know if i just need to change it at the client level ( outlook) or in my online account also.....
if online please step by step not just something like its in my account settings