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

asked 2021-03-10T21:50:39.433+00:00
HC2 1 Reputation point
  • 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. answered 2021-03-11T06:16:21.567+00:00
    JoyZ 17,886 Reputation points

    Hi @HC2 ,

    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:

    76596-image.png76595-image.png

    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.

    76558-image.png


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