extension-to-extension calling between two instances

Hi ​@Vipin Joshi,

Because your U.S. and India accounts have different unique IDs (UIDs), they are currently seen by RingCentral as two separate, distinct accounts.

Therefore, direct extension-to-extension dialing is not natively supported between them. A call from the U.S. instance to the India instance will be treated as an outbound external call, and yes, if the India account uses local Indian numbers, it will be classified as an international call by the U.S. instance, incurring standard international rates.

The only way to enable free, seamless extension-to-extension dialing is to consolidate both instances under a single master account UID.

Hi ​@Mary-Community_Moderator 

Thanks for the suggestion. 

Just to add-on we have implemented the Federated Portal by ring central post which we are able to do extension to extension calling.

But as we cannot enable teams dialing in indian RC instance, so we tried to forward the inbound call of our Indian instance to US instance for team's enablement which is working correctly.

the only challenge we are left with when user is dialing an outbound call from Microsoft teams its taking US instance trunk and showing US assigned DID. 

Need suggestion if anyone has implemented Federated in their environment.

Thanks for the additional information, ​@Vipin Joshi. Could you please send me a DM with your contact details so I can connect you with someone who can review your account, and check for possibilities and options?