Office 365 - Sharing to external users is not supported

Symptom:
A user at our tenant is not able to share files with external users. This issue is occurring for the Office Group, when the user tries to share a folder from the "Documents", with an external user, the following message appears "Sharing to external users is not supported". However when a colleague shares a document with the same external user account, the sharing is successful.

The affected user has created a new Office group and tried to share a document with an external user, however the same message appeared.

In the Office Admin Center, Security & Privacy, the tenant has the following settings:

Let users add new guests to the organization - on
Let users share SharePoint Online and OneDrive for Business content with people outside the organization - on
Users can share with - new and existing external users (sign-in required)

In the SharePoint Admin center:

Allow users to invite and share with authenticated external users
Let only users in selected security groups share with authenticated external users

Cause:

The user was not part of one of the security groups in SharePoint Admin Center

Resolution:

Added user to the any security group in SharePoint Admin Center and after was able to now able to share files and folders with external users.

Comments

GPT-5.2 Lands in Microsoft 365 Copilot: Smarter Reasoning for Workflows

Today Microsoft announced that GPT-5.2 is now available in Microsoft 365 Copilot and Copilot Studio , bringing two tuned variants: GPT-5.2 Thinking for deep reasoning and strategic work, and GPT-5.2 Instant for fast writing, translation, and skill-building. In Copilot, the model connects to Work IQ to surface insights across your meetings, emails, and documents—helping you turn scattered information into actionable plans. If you use Copilot Chat or Copilot Studio, you can pick GPT-5.2 from the model selector and try prompts like asking for strategic takeaways from a meeting, building comparative tables of market leaders, or preparing focused talking points for upcoming conversations. Microsoft emphasizes model choice , so teams can select the model that best fits the task while keeping security, compliance, and privacy controls in place. Rollout starts today 11-Dec-2025 for users with a Microsoft 365 Copilot license and will expand over the coming weeks; Microsoft 365 Premium...

Why MFA Matters in Microsoft 365 (and How to Enforce It the Right Way)

If you’re still relying on passwords to protect Microsoft 365, you’re leaving a critical gap in your security. A single phished credential can be enough to access email, files, chats, and sensitive business data. Multi-Factor Authentication (MFA) adds a second verification step—such as an Authenticator prompt, a one-time code, or a security key—so a password alone can’t grant access. As a Microsoft 365 administrator and technology enthusiast, I’ve seen firsthand how implementing MFA dramatically reduces account takeover risk and strengthens organisational security. Who this is for This guide is aimed at Microsoft 365 administrators, IT teams, and business leaders looking for practical steps to bolster tenant security with consistent MFA enforcement. Whether you’re managing a small business or a larger enterprise, the principles here apply to everyone seeking to protect critical business data. The goal: require MFA for interactive sign-ins Enforcing MFA for all interactive use...

6 ways to check SharePoint Usage reports

Introduction SharePoint administrators always want to know which user is accessing any site or site collection extensively and which user has access to the site but not using it. The other site details required are related to traffic, access, edit, etc. The user's behavior changes as per the nature of the site and their working department like project team site, department site, and managerial workspace. Fortunately, Microsoft 365 has given multiple methods to generate or view various reports related to SharePoint usage. We will check all the methods one by one and see how they provide the required results. Several options are available at different parts in SharePoint Site or Admin Center where the Administrator can check status or create reports. Method-1. Check Site Usage in Site Contents Page. The Site contents page shows the analytics data like their unique visitors, total site visits, average time spent by the user, etc. The report can be generated for multiple days like 7, 3...

SharePoint Excellence

Search This Blog