Unable to provide access to my Azure project

Question

Hi,

I am trying to enable a user to access a project I have in Azure. He has a corporate email (not my corporation - his company), which I have added both as an organization member and as a team member for the specific project. He can see the organization name, but when he tries to open the project in Visual Studio, he receives:

Git failed with a fatal error. Failed to create PAT remote: TF404019. The Git repository with name or identifier XXXXX does not exist or you do not have permission for the operation you are attempting.

repository 'https://dev.azue.com/xxx/_git/XXXXX not found

The repository exists and I have gone through the exact same process for his private MS email and it works as expected. The one difference I can see is that his corporate email is marked as an aad user and his private is just a user.

I cannot figure out what I am missing. Any help would be most appreciated,

Thanks,

Stan