PLEASE READ: Important information on updating your endpoints to TSEs!
Need to update your old MC endpoints to the new Tenant Specific Endpoints (TSEs)? Here are links to the relevant endpoint Knowledge Articles:
REST:
https://help.salesforce.com/apex/HTViewSolution?urlname=Marketing-Cloud-Update-REST-API-Integrations-to-Utilize-Your-Tenant-s-Endpoints&language=en_USSOAP:
https://help.salesforce.com/apex/HTViewSolution?urlname=Marketing-Cloud-Update-SOAP-API-Integrations-to-Utilize-Your-Tenant-s-Endpoints&language=en_USSSO:
https://help.salesforce.com/apex/HTViewSolution?urlname=Marketing-Cloud-Update-Your-Single-Sign-On-SSO-Login-URL-to-Your-Tenant-s-Endpoint&language=en_USMobilePush SDK:
https://help.salesforce.com/apex/HTViewSolution?urlname=Marketing-Cloud-Update-Your-MobilePush-SDK-to-Utilize-Your-Tenant-s-Endpoints&language=en_USSFTP:
https://help.salesforce.com/apex/HTViewSolution?urlname=Marketing-Cloud-Update-your-SFTP-Server-Integration-to-Your-Tenant-s-URL&language=en_US