Unable to load DLL 'activeds.dll'

I know this question was asked but nobody answer it.

I'm building web API on Core 2.2 with JWT token bearer. In token request I added check if user exist on our LDAP.

All working properly on IIS and console app but when I run with docker I'm getting:

"Unable to load DLL 'activeds.dll' or one of its dependencies: The specified module could not be found. (Exception from HRESULT: 0x8007007E)" 

error.

If user exist all working fine but when user not exist Im checking user status with:

UserPrincipal oUserPrincipal = UserPrincipal.FindByIdentity(oPrincipalContext, sUserName);

Which causing error above.

Im new to docker. I have tried to play with images:

mcr.microsoft.com/dotnet/core/sdk mcr.microsoft.com/dotnet/core/aspnet microsoft/aspnetcore-build

In all cases the same result

I have exposed LDAP ports in docker file (or I think I exposed) and still getting the same error.

My current dockerfile:

FROM mcr.microsoft.com/dotnet/core/sdk AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443
EXPOSE 383
EXPOSE 636

FROM mcr.microsoft.com/dotnet/core/sdk AS build
WORKDIR /src
COPY ["USITWebApi/USITWebApi.csproj", "USITWebApi/"]
RUN dotnet restore "USITWebApi/USITWebApi.csproj"
COPY . .
WORKDIR "/src/USITWebApi"
RUN dotnet build "USITWebApi.csproj" -c Release -o /app

FROM build AS publish
RUN dotnet publish "USITWebApi.csproj" -c Release -o /app

FROM base AS final
WORKDIR /app
COPY --from=publish /app .
ENTRYPOINT ["dotnet", "USITWebApi.dll"]

I'm using Windows containers.

I spent three days trying to solve this. If you have any ideas please help me solve this issue.