Cross-Tenant Access Settings guides
Microsoft Entra ID configuration for trust between Microsoft 365 tenants — B2B, shared channels, multi-tenant collaboration. See the glossary entry →
7 guides touch on cross-tenant access settings.
- Cross-tenant synchronization in Entra ID
Cross-tenant synchronization auto-provisions B2B guests between Microsoft Entra ID tenants in a multi-tenant organisation.
- Entra ID B2B guest access
How Entra ID B2B brings external users into your tenant as guests — invitations, controls, and lifecycle.
- Entra ID Multi-Tenant Organizations
MTO is Microsoft's modern model for running multiple Microsoft 365 tenants as one organisation. Here's what it provides.
- External access and guest access in Microsoft Teams
The four ways outsiders can collaborate with you in Teams — and the trade-offs between guest, external access, shared channels, and anonymous join.
- External collaboration in Microsoft 365, explained
B2B guests, Teams external access, shared channels, SharePoint links, cross-tenant sync: what each layer does, how they stack, and which to use when.
- Teams external collaboration patterns
Picking the right external-collaboration pattern in Microsoft Teams — guests, shared channels, federation, anonymous join.
- Teams shared channels vs standard channels
Shared channel vs standard channel in Teams: membership model, where files live, what's missing in shared channels, B2B direct connect, and a rule of thumb.