Newly invited guest to SharePoint site getting error message

[Oliver McErlane]

Hi,

I have invited a guest account to one of our sites, usually this works fine but for this new user he gets the error below. 

Any ideas why he would be getting this and what do i need to do so he can get access?

Thank you for your time,

Ollie

[#2]

I would get the user to sign out of all accounts on that machine and start afresh. It's strange that it works for some people and not others, but the page with the information regarding the config of guest users can be found a https://learn.microsoft.com/en-us/azure/active-directory/external-identities/external-collaboration-... Good luck

[#3]

Yes, you need to check the External collaboration settings in AAD https://portal.azure.com/#view/Microsoft_AAD_IAM/AllowlistPolicyBlade

[#4 · Accepted solution]

@Oliver McErlane You can allow the domain of user for external sharing.

Follow Microsoft official documentation for more information: Allow or block invitations to B2B users from specific organizations 

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[#5]

Hello, perhaps I should've added some additional context and not only the reason for the prompt. Consider applying External Identities cross-tenant access settings for B2B when your partners are not using non-Azure AD identities.

https://learn.microsoft.com/en-us/azure/active-directory/external-identities/what-is-b2b#manage-coll...