Public or private domain for Active Directory?

[Eiolon]

I need to setup a new domain soon. In the past I have always used the .local TLD for domains. I've been reading up on how Office 365 and Active Directory integration requires the domain to have a public, top-level domain TLD.

http://markparris.co.uk/2011/03/08/active-directory-local-domain-design-and-office-365/

I am curious if there are other things I need to consider beside that before deciding what to use. Is it difficult to migrate from local to public TLD if we choose to do so at a later time?

 

[gimp]

might be of help?
http://www.messageops.com/documenta...ation-services-design-planning-for-office-365

There's also a technet article, but it's more for migrating an existing infrastructure to Office 365
http://technet.microsoft.com/en-us/magazine/jj203573.aspx

 

[geiger]

You can do a massive UPN switch. Depending on legacy systems that might or might not be a massive undertaking.

 

[XOR != OR]

As has been touched upon, you can add a UPN suffix ( to match your public domain ) to any domain you have.

So name your domain whatever you wish, it doesn't really impact your possibilities.