Available with no additional cost to RingCentral MVP Premium and Ultimate customers.
Limitations
Users can’t use the same SSO Identity provider across multiple accounts.
Ten thousand total users across the whole federation if any companies/users have messaging enabled.
Extensions over five numbers do not correctly dial out (expected to be addressed by the end of Q3).
Can not call another user with the same site code on different companies in the same federation (expected to be addressed by the end of Q3).
Requirements
Main company number for all accounts to be linked.
Name of admin contact for each account.
Name for each linked account (to differentiate between linked accounts within the federation).
No duplicate extension numbers between linked accounts.
Activating the account linking feature
Contact RingCentral Support to activate account linking. Enabling this feature would require disabling your RingCentral app messaging, and reactivation might take up to 24 hours. Once activated, you must sign in with the primary account before signing in with linked accounts.