We have several documents in Libraries which we refer in the electronic newsletter etc… where we provide link of the document itself and then customer is prompted to login and after successful login redirected directly to the Library document link within customer community that they clicked in the newsletter. 

Redirection used to work in the portal but recently we moved portal into communities and it seems not working. When customer user clicks on document url (which is in libraries and he has access to it) then he is prompted to login and then it is not directly going to the document but it goes to content search page. Any help?