I recently had to reinstall Windows 10, and that meant a new install of Office 365. Suddenly it is subscribing all my email - and takes so long, It has never done it before. I've resorted to doing all email on Yahoo server. After some browsing, I discovered the issue is I installed an IMAP account which comes with all these "subscribing", so need to get back to POP account. I followed advice from someone to create a duplicate account, using POP setting in Mail app. I've tried that, but it doesn't give me the option of setting it up manually - and I can't create duplicate email account in Office 365 email. If someone doesn't have advice. I'll just delete the IMAP account and lose a few weeks of data for I can NOT live with the way it is.