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I am lookign at moving our company to SharePoint On-line from On Premise SharePoint 2007. We do not have any customisation on the site so it's a straight forward content copy. However i am wondering how best to set-up the tenancy. Can the user use all the functionality if our AD is staying onsite. Can i use our vanity domain (i.e. ABC.com) for user logins and SharePoint Address or do i have to create trusts with our on premise domain????. <br />
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Not fully sure where to start my research here. All help and advice welcome.<br />
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I would love to be able to add my domain to Office365 and let users login with separate passwords to AD, using email address as login name, but i wonder if it's as simple as this.
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I am lookign at moving our company to SharePoint On-line from On Premise SharePoint 2007. We do not have any customisation on the site so it's a straight forward content copy. However i am wondering how best to set-up the tenancy. Can the user use all the functionality if our AD is staying onsite. Can i use our vanity domain (i.e. ABC.com) for user logins and SharePoint Address or do i have to create trusts with our on premise domain????. 

Not fully sure where to start my research here. All help and advice welcome.

I would love to be able to add my domain to Office365 and let users login with separate passwords to AD, using email address as login name, but i wonder if it's as simple as this.

SharePoint On-line - Using Vanity Domain.

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.

Microsoft 365

Microsoft Sharepoint is a software platform and family of software products used for collaboration and web publishing combined. These capabilities include developing web sites, portals, intranets, content management systems, search engines, wikis, blogs, and other tools for business intelligence and collaboration. SharePoint has a Microsoft Office-like interface, and it is closely integrated with the Office suite.

Microsoft SharePoint

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.