Forum Discussion
Cannot add a "contact" in Exchange Online to an Office 365 Group as a Guest
Thanks George Khalil for reaching out! Currently adding of mail contacts as guest is not supported, however there is way you can add mail contacts for which you would need the administrator to remove the other mail-enabled object, after which the guest user object can be added by the group owner or by an administrator running cmdlet with mSExchHideFromAddressLists property as $false, this property would ensure that the contact is visible in GAL.
You can refer tenant admin documentation https://support.office.com/en-us/article/Guest-access-to-Office-365-groups-Admin-Help-7c713d74-a144-4eab-92e7-d50df526ff96?ui=en-US&rs=en-US&ad=US
Alternatively there is a very good and informative article written by TonyRedmond https://www.petri.com/external-access-office-365-groups about guests in Groups, which includes details about Guests in Groups.
Thanks folks for the feedback! This is something that we are actively working on for first half of 2017. We will keep you posted with updates.
I have a client that is experiencing similar issue as described by other folks on this thread: external user emails are in a dist list and we cannot add them to groups, which is a critical requirement.
Thank you for this response regarding this issue. I see that it's been a couple months since this reply. Are there any noteworthy updates? Is there a site or page we can use to track progress?
Cheers!