| Operating Environment | Minimum Level |
| Apache 2.2 | 3.400A |
| Apache 2.0 | 3.100A |
| Apache 1.3 | 2.100F |
| IIS 7.5 | Contact Macro 4 |
| IIS 7.0 | 3.700A |
| IIS 6.0 | 3.300A |
| IIS 5.0 | 3.210B |
When testing for support of new operating systems and subsystems, Macro 4's policy is to only test the current GA (General Availability) and EA (Early Availability) releases.
Macro 4 always recommend customers upgrade to the current release of software. We offer full support for current releases and will provide, where possible, fixes to older releases via a patch mechanism. In some cases a full upgrade to the current release may be required.