Confluence Cloud: Multiple Office 365 tenants at the same time are not supported
Release 1.11.0-AC (or later) solved this problem so that multiple tenants are supported at the same time
Problem
Currently, the following limitations are in place:
It is not possible to view SharePoint content (documents or lists) from multiple Office 365 tenants on one Confluence page.
It is not possible to configure SharePoint content from multiple Office 365 tenants using SharePoint Document and SharePoint List macro editor.
Cause
The SharePoint Connector for Confluence Cloud, in principle, supports multiple Office 365 tenants, but the user must be logged in to a tenant to view content from that tenant.
However, it is currently not possible to log in to different tenants in the same browser window.