Dear respected HelpMePlease3328,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
I’m sorry you’re having a problem but based on your description we can work together to resolve it.
For the situation you encountered, we deeply understand the inconvenience caused and apologize for it.
As per your description, generally, the External users access the shared Folder link a sign in the same invited email address when sharing Folder.
Firstly, may I know if the External user access the shared Folder link via switch to another browser, use in-private mode and then try visiting the link again to see the result.
The best practice is, you may add your External users as a guest user into Microsoft Azure AD and then share a Folder to External users. Or add an External user into SharePoint online group and then shared a Folder to group.
We appreciate your understanding that sometimes the initial suggestions may not resolve the problem very soon. However, we can work together to narrow down and resolve the situation. So, please kindly provide more information below to let us work further.
- Does the issue happen on all shared folder a specific one to External users?
Appreciate your patience and understanding and thank you for your time and cooperation.
Sincerely,
Waqas Muhammad