Rouge Access Developers.
I'm sure just about every organization has them.
People who operate data farms in Microsoft Access embedded within departments other than IT.
They gather data in silos, they work outside all constraints, they answer to no one.
Yet they are running entire departments / organizations.
Their data is a mystery.
Where do these reports come from? Who knows?
Until they are discovered and flushed out of their holes.
And then gobbled up by the IT department.
They resist as their empire is infiltrated.
You discover they have 2 dozen + Access applications throughout the building.
And you say to yourself, 'holy crapoli'.
How has this individual manage to stay under the radar for so long and in the process, make themselves so valuable?
How are we going to convert this mess, which took a decade to create, into SQL-Server and SSRS?
Once that data is migrated to an enterprise database, the applications with their custom forms & reports & VBA modules are converted to some Web based interface, the Access developer has lost their foothold.
But that could take some time.
I'm sure this scenario is quite common.