Upgrade offline to 9.3.1 NuGet mirror (4380945)

During an upgrade from One Identity Manager 9.2.1 to 9.3.1 in a restricted network environment (no Internet access), the compiler can not access the public NuGet repository.

How to create and use a local NuGet mirror for offline compilation for this type of upgrade?

Starting with version 9.3, One Identity Manager uses NuGet based dependency resolution for compilation.
When the environment does not allow Internet connectivity, the compiler cannot download needed NuGet packages from https://api.nuget.org/v3/index.json.
Therefore, a local mirror containing the same packages must be provided manually.

To perform a successful offline upgrade and compilation in One Identity Manager 9.3.1, follow these steps:

1. Prepare an online machine

• Install One Identity Manager 9.3.1 on a system with Internet access.
• Run a full system compilation using either:
• Designer - Database - Compile database..., or Launchpad - Database Compiler.
• This downloads all NuGet packages automatically.

2. Find the downloaded packages

• The packages are stored under: C:\Users\<username>\.nuget\packages
• or run the command: dotnet nuget locals global-packages -l

3. Create the local NuGet mirror

• Copy the contents of this folder to a shared location, for example: C:\NuGetMirror

4. Configure the offline environment

• On each offline machine that needs to compile
• Open the Registry Editor and create the following key: HKEY_CURRENT_USER\SOFTWARE\One Identity\One Identity Manager\Global\Compiler
• Add a String value: ExternalNugetSource = C:\NuGetMirror

5. Test compilation

After the mirror path is configured, recompile the database.
The compiler will use the local NuGet source instead of the public feed.

If compilation fails due to a missing package, download that specific .nupkg file manually from nuget.org and add it to the mirror folder.