How long should we expect our system to be unavailable for each monthly update?

Summary:

We need to turn off automation during the monthly update outage window. How long does the monthly update take?

Content (required):

We need to turn off automation during the monthly update outage window. How long does the monthly update take?

Version (include the version you are using, if applicable):

FCC

Code Snippet (add any code snippets that support your topic, if applicable):