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Guest access

Concept

The ability to add people from outside the organization to Microsoft 365 groups and Teams as guest objects in Microsoft Entra ID, controlled at tenant, team and sensitivity-label level.

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Title graphic: Guest access (Concept)
TypeConcept

Key points about Guest access

Episodes about Guest access

Harden Microsoft Teams Security and Guest Access

2025-12-03 · Video on YouTube

Your “private” Microsoft Teams channels are quietly bleeding data – and default settings are to blame. In this episode, we walk through real-world incidents where dormant guest accounts, synced libraries, and careless PII pastes turned Teams into a silent…

Harden Microsoft 365 Security Without User Friction

2025-11-03 · Video on YouTube

This episode dives deep into the foundations of Microsoft 365 security and why locking down your M365 tenant has never mattered more. The conversation opens with a look at what “Microsoft 365 security” truly means today: a constantly evolving mix of policies…

Microsoft Teams Governance with Entra ID as the Control…

2026-01-23 · Video on YouTube

In this episode, we dismantle a common Microsoft Teams governance myth: that the Teams Admin Center is the central command for controlling Teams behavior and enforcing governance. Most organizations treat the Admin Center like a control tower — but it’s…

From Garage Band to Symphony Orchestra- How Microsoft…

2026-08-16 · Video on YouTube

As Microsoft 365 grows, Teams, SharePoint sites and guest accounts multiply until collaboration turns into noise. In this interview, Heiko Brenn of BCC uses music metaphors to show IT leaders and governance owners how ownership, lifecycle management…

Microsoft Teams Channels vs Chat

2025-11-03 · Video on YouTube

Microsoft Teams channels are one of the most powerful yet misunderstood features in the entire Teams platform, and using them correctly can make or break your organization’s communication. In this episode, we dive into how Teams channels actually work, why…

Audit SharePoint Online Permissions at Scale

2025-08-14 · Video on YouTube

Manual SharePoint reviews don’t scale. Use PnP PowerShell + Microsoft Graph + Azure Automation to enumerate every site, expand nested/group/inherited permissions, and deliver a clean, daily report. App-only auth, throttling-safe queries, and diff alerts turn…

Find and Remove Orphaned SharePoint Sites

2025-11-22 · Video on YouTube

Your SharePoint isn’t messy – it’s a digital landfill you’re paying to host. Dead projects, duplicate “final_v7_REAL_final” files, ghost guest access, broken links, and a Copilot happily hallucinating on rotten content. This video shows you how to turn that…

The Microsoft 365 Governance Mistake 73% of Deployments…

2026-03-22 · Video on YouTube

This episode argues that the biggest governance mistake in Microsoft 365 isn’t misconfiguration—it’s timing. Most organizations treat governance as something to “add later,” but by doing that, they unintentionally design failure into the system from day one.…

Fix Microsoft 365 Guest Access Risks Across Services

2025-11-03 · Video on YouTube

Guest access in M365 isn’t a switch—it’s three identity layers and four services that don’t always agree. That mismatch creates silent exposure: a guest “allowed” in Teams can inherit broader SharePoint access; Purview often spots it after the fact. The fix…

Govern Microsoft 365 Guest Access and Offboarding

2025-11-03 · Video on YouTube

Your Microsoft 365 tenant is probably full of “guests who never left.” Contractors, vendors, and partners get invited for short projects—and their accounts quietly live on for years. That sprawl creates hidden risk: lingering access to SharePoint and Teams…

Prevent Dataverse Guest Access Data Leaks

2025-11-03 · Video on YouTube

Your Power App didn’t get “hacked”—it was over-permitted. Treating Dataverse like SharePoint (big buckets, broad roles) turns guest access into a data breach waiting to happen. Dataverse is a relational fortress built on granular privileges…

Fix Microsoft Entra B2B Direct Connect Issues

2025-08-05 · Video on YouTube

Flip One Azure AD Switch, Break Three Workflows? The Hidden B2B, Teams, and Conditional Access Domino Effect—And How to Stop It If B2B Direct Connect “works” until presence, file sharing, or guest invites start failing, you’re seeing the silent chain reaction…

2025-08-05 – Fix Microsoft Entra B2B Direct Connect Issues2025-08-14 – Audit SharePoint Online Permissions at Scale2025-11-03 – Fix Microsoft 365 Guest Access Risks Across Services2025-11-03 – Govern Microsoft 365 Guest Access and Offboarding2025-11-03 – Harden Microsoft 365 Security Without User Friction2025-11-03 – Microsoft Teams Channels vs Chat2025-11-03 – Prevent Dataverse Guest Access Data Leaks2025-11-22 – Find and Remove Orphaned SharePoint Sites2025-12-03 – Harden Microsoft Teams Security and Guest Access2026-01-23 – Microsoft Teams Governance with Entra ID as the Control…2026-03-22 – The Microsoft 365 Governance Mistake 73% of Deployments…2026-08-16 – From Garage Band to Symphony Orchestra- How Microsoft…2025-082026-08
Timeline of episodes about Guest access

Articles about Guest access (13)

Frequently asked questions

How do you secure guest access in Teams?

Require MFA for guests, apply conditional access and device compliance, and use Entra ID governance to expire guests and automate access reviews. This removes dormant accounts. · From the episode: Harden Microsoft Teams Security and Guest Access

What hidden costs does SharePoint sprawl cause?

The show notes mention downtime, security vulnerabilities and knowledge dependency on specific individuals. Sprawl also reduces productivity and collaboration, and ghost guest access adds risk nobody is watching. · From the episode: Find and Remove Orphaned SharePoint Sites

Why is Microsoft 365 guest access risky?

It spans three identity layers and four services that can disagree. A guest allowed in Teams may inherit broader SharePoint access, which creates silent exposure that Purview often spots only afterwards. · From the episode: Fix Microsoft 365 Guest Access Risks Across…

How can you fix guest access risks?

Combine lifecycle management, least privilege and evidence. The episode offers a scalable framework to invite, govern, review and retire guests without strangling collaboration. · From the episode: Fix Microsoft 365 Guest Access Risks Across…

Why is Purview not enough alone for guest access?

It often detects problems after the fact. Preventive lifecycle and permission controls are needed so that over-broad guest access is stopped before it appears in a report. · From the episode: Fix Microsoft 365 Guest Access Risks Across…

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Maintained by Mirko Peters (Microsoft MVP) · Last updated: