External Collaboration
Guest access, B2B direct connect, and Shared Channels — configured, governed, and secure. Partners collaborate in your tenant. Your data stays under your control.
Your Data Is Already Leaving — Just Through the Wrong Channels
Every mid-market company collaborates with external partners. Agencies, customers, auditors, resellers, freelancers. Without a sanctioned external collaboration model, employees improvise: forwarded emails, WhatsApp groups, personal Dropbox, files attached to consumer Gmail accounts. The data leaves the tenant before IT even knows there is a project.
This is not a failure of your IT team. Microsoft Entra External ID offers three distinct collaboration modes — Guest Access (B2B collaboration), B2B Direct Connect (Shared Channels), and cross-tenant access settings — each with dozens of switches. Used together and governed correctly, they close the shadow-IT problem. Deployed without a plan, they create new risk.
Traditional consulting for external collaboration? Two months, five figures, a consultant who configures the switches and leaves. Your team ends up with settings they did not design and governance they cannot explain to auditors.
ACTIVITIES IN DETAIL
DELIVERABLES
Inventory current external collaboration: existing guest users, external-sharing audit in SharePoint and OneDrive, shared channels in Teams, shadow-IT indicators
Map your top 20 external partners: type (customer, vendor, freelancer, auditor), required access level, planned duration
Design the decision matrix: Guest Access vs. B2B Direct Connect (Shared Channels) vs. external sharing link — one page, driven by partner type
Configure Microsoft Entra cross-tenant access settings: default outbound and inbound policies, organization-specific trust settings for strategic partners, MFA and device trust claims
Configure external collaboration settings: who can invite guests (all users, specific role, or admins only), guest user directory access restrictions
Domain allow/block list: block consumer domains for sensitive teams, allow trusted partner domains
Set up B2B Direct Connect for a pilot partner organization — Shared Channels trust both ways, validated end-to-end
Align with sensitivity labels: “Public” allows anonymous links, “Confidential” blocks external sharing, “Strictly Confidential” blocks guests
Conditional Access for guests: require MFA on access, accept MFA claims from home tenant where trusted, restrict to approved locations if needed (Entra ID P1 required)
Guest lifecycle: sponsor assignment, access reviews (quarterly for sensitive teams), automatic removal on inactivity
Partner onboarding runbook: invitation flow, consent experience, first-login troubleshooting
Next steps after External Collaboration
A cleanly configured tenant is the foundation. These blueprints build directly on it
