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HC2-0553 avatar image
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HC2-0553 asked ·

Why can't I add an external user to SharePoint Group via Outlook?

  • I am trying to add 3 users to a SharePoint Group. All users are from the same external domain. I have confirmed each user does have an Office 365 account associated with their email addresses.

  • I get the following message: "The following person couldn't be added. Retry."

  • I am trying to do it via Outlook (web-based) / Groups / Add Members

  • I have updated the permission settings in Admin / Azure Active Directory / External Collaboration Settings

  • I have updated the permission settings in SharePoint Admin / Sharing & Sites. I have tried this with both Anyone with the link can access set, as well as New & Existing Guests Set. I have made sure all sharing settings w/ outside domains are correctly applied.

  • The SharePoint site is still listed as a "Private Group" - not sure if this has anything to do with the issue

  • I have also added these email addresses as mail contacts in Exchange with no luck

Why am I unable to add these external users? I added someone else with a Gmail account, as well as a few people from another organization w/ their own domain, so I'm not sure what the issue is.



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1 Answer

JulieWang-MSFT avatar image
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JulieWang-MSFT answered ·

Hi @HC2-0553,

Per my test, if I set the collaboration restrictions only to the specified domains, then add guest users who do not belong to the target domains, the issue occurs:

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We suggest you check the restricted domains again or allow invitations to be sent to any domain (most inclusive), save the change, add the external user again to compare the result.

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Thank you, that would make sense, but unfortunately my collaboration restrictions are already set that way / are set to allow invitations to be sent to any domain.

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Hi @HC2-0553,

In order to get a better forum experience, we changed your answer to a comment.

Could you add users to member group from other external domains?

Please try it and feel free to reply if there is any update.

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HC2-0553 avatar image HC2-0553 JulieWang-MSFT ·

Yes, I could add users from other external domains.

I ended up creating a new account and not connecting my domain at all. Now I have no trouble adding the affected email addresses as users.

So looks like it was a DNS issue. Just have no idea what.

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