I am having an issue adding a relationship to my User entity. I am using the Customizations function under Settings. The problem seems to be only related to the User entity.
What happens is that when I select an N:1 or 1:N relationship under User and enter the information, I get an error when I press Save or Save and Close.
The error is very general - just states there is a problem and if it continues to contact Microsoft Support.
Note: I have received this error before when clicking Save and have been able to get around it by clicking Save and Close. In this case, however, that does not work.
Any ideas would be appreciated.