We have a problem to get data from other's domain in the application
[What we want to do ]
1.get domainB's gmail(belong to himself ) in domainA
2.get data from namespace=domainB in domainA
3.get domainB's google calendar (belong to himself ) in domainA
[Condition ]
1.domainA is belong to parent company ,which, domainB is belong to the child company
How can we do this?