
ArticleCloud Migration
Atlassian Cloud Architecture: Organization, Site, Product, and What a Migration Crosses
An Atlassian Cloud tenant has a real shape: one organization, one or more sites under it, a product provisioned per site, and a directory that decides who gets in. This is that shape, sourced from Atlassian's own admin docs, plus the part that actually matters for a migration: a Data Center move crosses every one of those boundaries fresh, while a Cloud-to-Cloud move keeps identity and uses a documented tool with its own documented gaps.