NBU Upgrade preparation to 7.6

Hi Fellow Forumers,

We are planning to upgrade our NBU environment. Currently the version is 7.1 running on Redhat Linux. NBAC is also configured on their NBU.

Now the scenario.

We need to upgrade the NBU master to 7.1 and we need to retained the NBAC without reconfiguring it after the NBU upgrade.

What will be our procedure to retained the NBAC?

Thanks in advance...