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Article ID: CTX296617
                        
                    
                    
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Updated On: 
                    
                 
                
                    
                
                    
                    
                        
                            
Description
                        
                        
                            - Accessing the Citrix Studio after the Always on failover prompts to Reenter the controller address or enter a new address
- Clicking on the view details has the Exception listed as :
Error Id: XDDS:3680CBC1 
Exception: StackTrace: Citrix.Console.DeliveryCenter.UI.Dialogs.CcsFailedException valida Delivery Controller services were not found at the specified location. Reason: Database rejected connection
 
                         
                     
                    
                    
                    
                    
                        
                            
                                
Resolution
                            
                            
                                Add the Delivery Controllers machine account is added to the logon accounts on all the Database servers behind the SQL Always-on.
The required permissions are automatically configured when Citrix Studio/Site is configured. However, such issues might occur if the access is provisioned manually or through the SQL Scripts. 
Problem Cause
You may refer 
https://support.citrix.com/article/CTX127998/database-access-and-permission-model-for-xendesktop for the required Database Access and Permission Model.