Starting with version 9.1.1, IBM Marketing Platform supports federated authentication, which can be configured for single sign-on with external entities such as Google, Salesforce, Amazon, or the customer's in-house authenticators.
After integration, IBM Marketing Platform allows users who are authenticated externally to seamlessly access all Omni Channel Marketing products such as IBM Campaign, IBM Interact, and IBM Marketing Operations.
A federation consists of an Identity Provider (IdP) server and service providers (SPs), as illustrated below.
You might have read the announcement that HCL is in a definitive agreement to acquire select IBM software products including Marketing Software. The announcement can be found here. The transaction was announced on December 6, 2018 and is expected to close mid-2019 subject to regulatory review.