You use machine prefixes to generate the names of provisioned machines. Machine prefixes are shared across all tenants.
You should assign a default machine prefix to every business group that you expect to need IaaS resources. Every blueprint must have a machine prefix or use the group default prefix.
Fabric administrators are responsible for managing machine prefixes. A prefix is a base name to be followed by a counter of a specified number of digits. For example, a prefix of g1dw for group1 and developer workstation, with a counter of three digits produces machines named g1dw001, g1dw002, and so on. A prefix can also specify a number other than 1 to start the counter.
If a business group is not intended to provision IaaS resources, tenant administrators do not need to assign a default machine prefix when they create the business group. If the business group is intended to provision IaaS resources, tenant administrators should assign one of the existing machine prefixes as the default for the business group. This assignment does not restrict blueprint architects from choosing a different prefix when they create blueprints. A tenant administrator can change the default prefix of a business group at any time. The new default prefix is used in the future, but does not affect previously provisioned machines.