Actually, there are 4 places, not 3 to manage external collaboration and guest access in Teams.
Azure Active Directory Settings.
Guest Access Settings in Microsoft Teams.
Guest Settings in Microsoft 365 Groups.
SharePoint Sharing Settings for organization and sites
So to avoid such confusion, you have first to understand Guest access Vs External access in ...
I have been dealing with these external access issues for quite some time. The first part of the question - If they are using Office 365, ALWAYS use the ORGANIZATIONAL EMAIL, Microsoft has worded this screen absolutely terribly.
The second issue, where end users get errors, make certain the external user is using in-private or incognito browsing. What we ...
According to this Microsoft article,
Global admins, SharePoint admins, and site admins all need to be
assigned a SharePoint license.
In my point of view, for safety consideration, external user cannot be global administrator.
Yes, it can be achieved. You need to enable Microsoft SharePoint integration with Azure AD B2B first.
Microsoft official article：
Azure AD B2B provides authentication and management of guests. Authentication happens via one-time passcode when they don't already have a work or school account or a Microsoft account.
You can list all external users for the entire SharePoint Online tenant by using following option.
Method 1: Use PnP PowerShell to list all external users.
Connect-PnPOnline -Url "https://tenant-admin.sharepoint.com"
For more details use this link List external users
Method 2: Use graph api to list all external users
If you give an external user Read permission to access the Organization Asset library , then the external user can use the assets inside the Organization Asset library.
#Create an organization assets library
Add-SPOOrgAssetsLibrary -LibraryUrl <URL> [-ThumbnailUrl <URL>] [-OrgAssetType <ImageDocumentLibrary or OfficeTemplateLibrary>] [-...
The global search box in modern SharePoint is hidden by default for external users, and there is no setting to turn it on currently, even if they are still able to use search function in this library.
Here are a few workarounds:
Give the external users (at least View Only) permission at site level, which will give them access to the old version of search ...