# The domain is the tenant

- You sign into one domain. Skill groups, users, lists, prompts, scripts, and campaigns live there. Another domain does not inherit them.
- Five9 does not use CUCM-style partitions and calling search spaces. If you are coming from Unified Communications Manager, do not look for a partition table. Look for the domain, then skills and campaigns. That mapping is a teaching bridge, not a vendor migration wizard.
- State the domain boundary
- Say which roles join a skill group

## Sources and go deeper

- [Planning your implementation](https://documentation.five9.com/bundle/basic-admin/page/basic-admin/intro/planning-your-implementation.htm). vendor. last checked 2026-10.
- [Skill groups](https://documentation.five9.com/bundle/basic-admin/page/basic-admin/skill-groups/_ch-skill-groups.htm). vendor. last checked 2026-10.
- confirm. This lesson's CUCM comparison is a teaching map. Five9 does not publish it as a migration product. last checked 2026-10.