Why does the authentication pop-up display?

Solution

Overview

There can be many reasons why users may receive authentication pop-ups. This article explains only one specific example. 

When NTLM authentication for proxy authentication is employed, authentication pop-ups display when you change the Windows password by password policy.

Cause
Resolution

Condition:
Authentication pop-up box displayed when customer change the windows password by password policy.
A special application is used to change the Windows password, which causes the authentication pop-up.

Troubleshooting steps:
1. To check authentication password: Change the authentication method for only basic credential (this option is just for troubleshooting so that you can confirm with a packet capture the actual password being sent from the browser).
2. BCAAA debug: see 000010313
3. Take a packet capture (PCAP)

Potential Results:
From PCAP:  Windows client used an old password for Proxy authentication. If this is the case, the problem is not caused by the ProxySG but rather the client sending an incorrect password.

Workaround
Additional Information
Bug Number
InQuira Doc IdKB3941
Attachment

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