SharePoint Team Site owner unable to share outside Team

Question

In tenant for corp.com, there is a user@othercorp.com set up as a B2B Member (instead of guest) in the corp.com Azure AD. user@othercorp.com is set as the owner of the Microsoft 365 Group "Team" in corp.com Azure AD. When this user tries to share a folder from the team site to someone that is not in the group, an error message below the people picker is shown "We couldn't find an exact match".

Another account, owner@corp.com is also an owner on "Team" in corp.com. This account is able to share to anyone from the team site regardless of whether they're in "Team".

Things I've confirmed:

• External sharing is allowed on the site and within the tenant
• A newly created B2B Member set as owner on "Team" has the same issue
• AzureADB2BIntegration has been abled on this tenant

What am I missing that is preventing user@othercorp.com from being able to share the same way owner@corp.com can?

Answer 1

Hi @Ethan Kershaw,

Thank you for posting in this community.

For your question, perhaps you should look at the SharePoint sharing settings.

There are two types of SharePoint sharing settings, organization-level and site-level. Organization level for the whole SharePoint, site level for a certain site. This setting determines who can share content or files in SharePoint to others.

First, check your organization-level sharing settings. This article details how to manage the organization level external sharing setting: Change the organization-level external sharing setting.

Second, check your site-level sharing settings. This article details how to manage the site level external sharing setting: Change the sharing settings for a site.

After completing the above steps, I suggest you wait a while for the settings to take effect, then clear your browser cache and try sharing the files again.

If the problem persists, please describe in detail the problem you are experiencing. Screenshots would be better. Please note that your private information will be coded. Thank you for your support and cooperation!

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Answer 2

Hi @Ethan Kershaw,

Please accept my sincere apologies for the late reply. It took me some time to reproduce your situation.

In my side, user@othercorp.com can successfully share a folder to a user that is in the tenant (person@corp.com).

I noticed from your AAD screenshot that there is a slight difference with mine.

Mine is Reset redemption status and yours is convert to external user.

Therefore, I suggest you delete this user(user@othercorp.com) and add him again.

You can follow this link to Add Azure Active Directory B2B collaboration users in the Azure portal.

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Answer 3

After months of not being able to share correctly, this is resolved after following instructions here: https://learn.microsoft.com/en-us/answers/questions/1339570/sharepoint-online-onedrive-we-couldnt-find-an-exac

Key points (pulled from several different comments)... use SharePoint Online Management Shell to run the following

Set-SPOTenant -UseFindPeopleInPeoplePicker $false
Set-SPOTenant -ShowPeoplePickerSuggestionsForGuestUsers $true
Set-SPOTenant -AllowGuestUserShareToUsersNotInSiteCollection $True