Logs 

" 2017-09-05T16:09:55.988+0530 ",<MDM>,ERROR (2),__48-[X1MDMEnrollFlowController createEnrollSession]_block_invoke,"request to create enrollment session unauthorized with 401",Active,com.apple.main-thread,403,Secure Hub,/jenkins/workspace/iOS_SecureHub/AppStore/Me@Work/Me@Work/Controller/X1MDMEnrollFlowController.m,1212 
" 2017-09-05T16:09:55.989+0530 ",<MDM>,DETAIL (5),-[X1MDMEnrollFlowController handleServerError:errorMessage:],"Error Message for auth error is (null)",Active,com.apple.main-thread,403,Secure Hub,/jenkins/workspace/iOS_SecureHub/AppStore/Me@Work/Me@Work/Controller/X1MDMEnrollFlowController.m,2102 
" 2017-09-05T16:09:55.989+0530 ",<MDM>,ERROR (2),-[X1MDMEnrollFlowController handleServerError:errorMessage:],"handleServerError response 401 with title and detail text Citrix Secure Hub Please check your credentials. You may have mistyped them.",Active,com.apple.main-thread,403,Secure Hub,/jenkins/workspace/iOS_SecureHub/AppStore/Me@Work/Me@Work/Controller/X1MDMEnrollFlowController.m,2144 
" 2017-09-05T16:09:55.992+0530 ",RECEIVER_UI,ERROR (2),-[UICoordinator showErrorMessage:options:delegate:dismissed:],"Root cause for the error is : (AuthCredentials error 19.)",Active,com.apple.main-thread,403,Secure Hub,/jenkins/workspace/iOS_SecureHub/AppStore/Me@Work/Coordinator/UICoordinator.m,634 

• Reboot the server once.
• Ensure XenMobile have valid license activited.
• Ensure the server certificate on NetScaler Gateway and on Xenmobile is in complete chain.
• Ensure the CA Root cert is present on NetScaler.
• Verify if under XenMobile Admin Console, enrollment profile if we have set device limit per user if the number exceeds the number mentioned than it is expected behavior of the device to fail on second profile installation

Problem Cause