Share SharePoint folder with Everyone (no sign in required)

Overview: Microsoft protect your SharePoint Groups by requiring sign in. In the real world you may have a genuine business need to share a resource (file/folder) with someone who realistically will not sign in - perhaps a key client who needs quick and easy access to a resource. If you want to take on the responsibility of sharing a resource via a link - which could in theory be passed onto a 3rd party - then here we outline how to do it.

Before you begin you will need 3 pieces of info:

• An email address and password of someone with Admin rights to the Office 365 tenant (Example: admin@companyX.onmicrosoft.com)
  • In the code below enter this email address in the $adminUser field
• The tenant subdomain on sharepoint.com 
  • For example, if the URL is "https://companyXcom.sharepoint.com/sites/" then the subdomain is companyXcom
  • In the code below enter this subdomain in the $sharepointSubdomain field
• The SharePoint Group name
  • For example, if the URL is "https://companyXcom.sharepoint.com/sites/ProjectXYZ/" then the Group name is ProjectXYZ
  • In the code below enter this subdomain in the $sharepointGroupName field

Running the code

If you don't have it, install the SharePoint Management Shell https://www.microsoft.com/en-us/download/details.aspx?id=35588

Launch the SharePoint Management Shell and paste in the code below (after inserting your admin email, subdomain, and group name)

$adminUser="########"
$sharepointSubdomain="########"
$sharepointGroupName="########"
$userCredential = Get-Credential -UserName $adminUser -Message "Type the password for the admin account"
Connect-SPOService -Url https://$sharepointSubdomain-admin.sharepoint.com -Credential $userCredential
Set-SPOSite -Identity https://$sharepointSubdomain.sharepoint.com/sites/$sharepointGroupName -SharingCapability ExternalUserAndGuestSharing

And that's done! Visit the SharePoint folder online and attempt to "share" a resource - you can now share with "Everyone":