Since early 2009, Clinton and her aide Huma Abedin have had private email accounts on the clintonemail.com domain, which is hosted on Clinton’s private email server.
According to a September 2016 FBI report, the new domain hrcoffice.com is created in December 2014. In a later FBI interview, Abedin stated the clintonemail.com system was “going away,” and after the initiation of the new domain, she didn’t have access to her clintonemail.com account anymore. Presumably the same is true for Clinton (and the few others who had email accounts on the domain, such as Chelsea Clinton).
The FBI report will indicate the hrcoffice.com domain is hosted on different equipment, which presumably means a different server. But the clintonemail.com server will continue to run until October 2015, when it will be confiscated by the FBI.
As part of the transfer process, Platte River Networks employee Paul Combetta copies all of Clinton’s emails from her current account on the clintonemail.com server to her new acccount on the hrcoffice.com server.
In Clinton’s July 2016 FBI interview, the FBI will summarize Clinton as saying: “Clinton transitioned to an email address on the hrcoffice.com domain because she had a small number of personal staff, but no physical office or common email domain. To address these issues, she moved to a common email domain and physical office space. After this move, Clinton did not recall any further access to clintonemail.com.”
The switch comes about one month after the State Department formally asked Clinton for all of her work-related emails from her secretary of state tenure, when she used her clintonemail.com account. (Federal Bureau of Investigation, 9/2/2016)