Bug ID 481987: Allow NTLM feature to be enabled with APM Limited license

Last Modified: Nov 07, 2022

Affected Product(s):
BIG-IP None(all modules)

Known Affected Versions:
11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5

Fixed In:
12.0.0, 11.6.0 HF6, 11.5.2

Opened: Oct 01, 2014

Severity: 3-Major


When a BIG-IP system has an APM Limited license, NTLM is silently disabled and the connection goes through. This breaks many (all) use-cases for Exchange + APM.


Exchange cannot be used with APM Limited license when NTLM frontend authentication is selected, which is used in essentially all APM + Exchange deployments.


APM and Exchange are deployed together with APM Limited / Lite license.



Fix Information

The NTLM frontend authentication (ECA) feature can now be used with an APM Limited license. Typically, this is for Exchange deployments.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips