Bug ID 720214: NTLM Authentication might fail if Strict Update in iApp is modified

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP APM(all modules)

Known Affected Versions:

Fixed In:
14.1.0, 14.0.0,

Opened: May 15, 2018
Severity: 2-Critical


Exchange Proxy NTLM Authentication failure when iApp strict updates is disabled initially and then turned on. NTLM authentication fails with STATUS_NO_LOGON_SERVERS.


Any service using NTLM authentication will be disrupted.


The Strict Update option in the iApp is modified.


Restart ECA and NLAD modules to work correctly again. To do so, run the following commands: bigstart restart nlad bigstart restart eca

Fix Information

NTLM authentication now works as expected when Strict Update in the iApp is modified.

Behavior Change