Unable to add users to SharePoint site permissions

Msdc 271 Reputation points
2021-07-27T12:42:52.707+00:00

Hello,

I am having issues with adding new users to SharePoint team sites and just wanted to confirm if this is the issue. So the company recently merged with a new company but have two different domains but login names are the same. So I am trying to add both accounts domain1\username1 and domain2\username1 and I continue to receive error User is not unique or does not exist. So previously the company had entire different employee id/usernames but they are now using the same login names moving forward on both domains and I am wondering if this is the issue as it seems to only be with these new accounts that now have same usernames. Should I be able to add both accounts since they are technically on 2 different domains or is SharePoint only seeing the username1 which is the issue?

Thanks N Advance

SharePoint Server
SharePoint Server
A family of Microsoft on-premises document management and storage systems.
2,217 questions
SharePoint
SharePoint
A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
9,607 questions
SharePoint Server Management
SharePoint Server Management
SharePoint Server: A family of Microsoft on-premises document management and storage systems.Management: The act or process of organizing, handling, directing or controlling something.
2,798 questions
0 comments

1 answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. CaseyYang-MSFT 10,321 Reputation points
    2021-07-28T03:16:27.01+00:00

    Hi @Msdc ,

    This issue happens because SharePoint is currently using the username to determine whether the user exists or not. So as a workaround, you could try to change domain2\username1 to domain2\username11 and add it again.

    If an Answer is helpful, please click "Accept Answer" and upvote it.

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.