+After updating @users.csv@, you can preview the migration using the @--dry-run@ option (add @--tokens tokens.csv@ if not using LoginCluster). This will print out what actions the migration will take (as if it were happening) and report possible problems, but not make any actual changes on any cluster:
+
+<pre>
+$ arv-federation-migrate --dry-run users.csv
+(person_b@example.com) Migrating x6b1s-tpzed-w4nhkx2rmrhlr54 to x3982-tpzed-1vl3k7knf7qihbe
+</pre>
+
+Execute the migration using the @--migrate@ option (add @--tokens tokens.csv@ if not using LoginCluster):