Virtualcenter precheck migration from 5.5 to 6.5. Source vCenter Server schema validation found an issue.

Felmeddelande med Precheck vid migrering: Error: Source vCenter Server schema validation found an issue. 1 [42000](50000) [Microsoft][SQL Server Native Client … More

Vsphere 6.5 Update 1

Vcenter server must be in reversed lookup zon in dns. Or you will not able to login.