This hotfix release of Veeam Backup for Nutanix AHV Plug-In (build 12.6.0.636) is intended to be deployed over an existing deployment of Veeam Backup & Replication 12.2.0.334 with Veeam Backup for Nutanix AHV Plug-In 12.6.0.632.

Veeam Backup for Nutanix AHV Plug-In build 12.6.0.636 resolves the following issues:

• The Nutanix AHV Veeam Appliance is listed as unavailable, and attempts to update Proxy parameters fail with errors:

  Failed to edit the backup appliance settings: The backup appliance did not start within the expected time period
  

  or

  Failed to synchronize jobs: Communication channel has been forcibly closed.
  

  When this occurs the Appliance Web-UI shows error 502.
• AHV cluster rescan fails with with the error:

  JSON integer <integer> is too large or small for an Int32
  

3. Extract the package to a folder on the Veeam Backup Server.
   
4. Close all Veeam Backup & Replication console sessions on the Veeam Backup Server.
   Process name: veeam.backup.shell.exe
5. Open Programs and Features (appwiz.cpl) and uninstall "Nutanix AHV Plugin for Veeam Backup & Replication" version 12.6.0.632.
6. From the folder where you extracted the download zip, right-click on NutanixAHVPlugin_12.6.0.636.exe and select "Run as administrator" to install the new plugin version.
7. After installing the new plugin, open the Veeam Backup & Replication console and manually create a new configuration backup.
   Be sure you know the backup file encryption password, and then use the 'Backup now' button to create the latest configuration.
8. If the proxy server's status is not 'Out of Date', rescan the Nutanix Clusters.
9. Right-click on the out-of-date proxy and select Upgrade to upgrade the proxy appliance.
10. When the proxy appliance upgrade is complete, enable jobs disabled in Step 1 and test functionality.

If you are still experiencing issues after applying the suggested steps, open a case with Veeam Support.