1. - [ ] Mandatory Choose the documentation release (Published releases are refreshed ~weekly after publication). 
     
      - [ ] ACM 2.4
      - [ ] ACM 2.5
      - [x] ACM 2.6
      - [x] ACM 2.7
 

2. - [ ] Mandatory Choose the type of documentation change.

      - [ ] New topic in an existing section or new section
      - [x] Update to an existing topic

3. - [ ] Mandatory for bugs: What is the diff? Clearly define what the problem is, what the change is, and link to the current documentation:

During testing of Submariner with OCP 4.12, we found an issue related to Azure platform and we should document that OCP 4.12 is not supported on Azure at this time. We are working to fix the issue for future 2.6.z and 2.7.z releases.

2.6 release notes: https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.6/html-single/release_notes/index#submariner-known-issues

2.7 release notes: https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.7/html-single/release_notes/index#submariner-known-issues

4. - [ ] Mandatory for GA content:
            
Dev bugs: https://issues.redhat.com/browse/ACM-3430 (2.6.z), https://issues.redhat.com/browse/ACM-3223 (2.7.z)