SecureHub keeps prompting to login randomly even though the timeouts are correctly set on XMS server. 

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Correct the configuration as the logs say "Invalid Server Configuration" by disabling Password Caching and Encrypts Secrets using Password

Steps to Disable
Go to XenMobile client properties by Clicking on Settings > Client > Client Properties.

1. ENABLE_PASSWORD_CACHING--> Set to false
2. ENCRYPT_SECRETS_USING_PASSCODE--> Set to false

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Problem Cause

Citrix PIN is disabled under client properties, however Password Caching and Encrypt Secrets using Passcode was enabled (It is specific to Citrix PIN).

In the logs we see:
"2017-05-06T20:25:20.668-0700","Secure Hub","INFO ( 4)","com.citrix.work.profile.ProfileHelper:oldPasswordCaching = true oldCitrix PIN =false",32596,32743,Secure Hub, , ,0 
"2017-05-06T20:25:20.668-0700","Secure Hub","INFO ( 4)","com.citrix.work.profile.ProfileHelper:newPasswordCaching = true newCitrix PIN =false",32596,32743,Secure Hub, , ,0 
"2017-05-06T20:25:20.668-0700","Secure Hub","INFO ( 4)","com.citrix.work.profile.ProfileHelper:PasswordCaching =trueand Citrix PIN =false set in Account record.Invalid server configuration. Ignored the flags. ",32596,32743,Secure Hub, , ,0 

Android-SecureHub-prompting-for-login-even-though-device-is-locked-or-when-using-apps even the timeout is correctly set