Before my small business signed up for Office 365, we had a public facing website that was maintained and edited by a third party. We made the switch to use Microsoft's email and file sharing functions, but in the process we lost the use of our already existing website. I have since been able to change the name servers so that the website is again viewable, however our webpage designer is unable to edit the site at all.
What do I need to do to move the name servers so that our site can be edited, without disrupting our email and file sharing services??