MS Outlook 365 settings for connection to a UK ISP

Hello from England

Just after Christmas I treated myself to a refurbished iMac, replacing my Windows PC. Model is MB324BA running Yosemite 10.10, 2.66GHz processor, 4Gb RAM. I have also downloaded Microsoft Office 365 for Mac. As part of this suite I get Outlook 365, but I can't set up an email account on this software.

I have tried talking to my ISP (Talktalk) but they do not offer support to "3rd party software providers." On their website they do offer suggestions on Port Settings etc for if I was using Outlook 2011 for Mac. Tried these but no success!

I have also tried talking to Microsoft Support, but they just keep bouncing my call around the world saying that they have a specific department that will be able to help, yet I never seem to get any answers!

Is there anyone in the community who can help please.

Thanks,

Lurch