Email deleted on server is deleted from Outlook 2019

Try as I might I cannot locate anywhere in either Outlook or in my Xfinity settings to change this - when I delete an email from Xfinity webmail that email is deleted from my Outlook inbox as well. 

I would like Outlook to retain the emails it receives and remove them from the server once they have been received.  I'm presently set up for IMAP.

There appear to be multiple treads addressing this issue for earlier versions of Outlook but I'm unable to view them - clicking on the link returns me to the main help page;  its quite frustrating.