AIP UL Scanner database schema issue (DB pre-created)

Hello everyone,

Trying to install and configure the AIP UL Scanner in preview for a client. However, because of internal security policies, it was not possible to let the Install-AIPScanner cmdlet create the SQL database itself. We had to ask the DBA to create the AIP Scanner DB prior to the Scanner installation.

We followed the instructions found here:

https://docs.microsoft.com/en-us/azure/information-protection/deploy-aip-scanner#restriction-you-cannot-be-granted-sysadmin-or-databases-must-be-created-and-configured-manually

Then I followed the standard AIP Scanner installation and configurations steps. Service was installed (with a SQL error that was expected since it is documented), we also completed the Azure App Registration configuration and ran the Set-AIPAuthentication cmdlet with success.

After starting the AIP scanner service, I was expecting the Scanner to show up in the Azure AIP Scanner Nodes list. It did not. 

I then ran Start-AIPScan locally hoping that the service would report itseft to Azure but received the following error:

>> TerminatingError(Start-AIPScan): "Invalid database schema. Run the Update-AIPScanner cmdlet to upgrade your database."
Start-AIPScan : Invalid database schema. Run the Update-AIPScanner cmdlet to upgrade your database.

This was a surprise to me but since this approach (pre-creating the SQL DB) is not so well documented (especially for the UL client in preview), I thought I should try to run the Update-AIPScanner cmdlet and see how it goes from there. The result was not better. Here's the error I got:

>> TerminatingError(Update-AIPScanner): "An error occurred during deployment plan generation. Deployment cannot continue."
Update-AIPScanner : An error occurred during deployment plan generation. Deployment cannot continue.

I did search the web for these errors and cannot find anything at all.

Would anybody have an idea of what I'm doing wrong? Anybody that pre-created the SQL DB before running the AIPScanner UL client installation?

Thanks.