Consider the following scenario:
- You browse to the OneDrive page for an Office 365 group.
- You click a document or folder and then click Share.
- When you type the account for an external user, you receive one of the following error messages:We couldn’t find an exact match.Sorry, you are not allowed to share this with external users.
This issue occurs because sharing files with external users from an Office 365 group site isn't supported.
Article ID: 3122713 - Last Review: Dec 21, 2016 - Revision: 1
Microsoft SharePoint Online