The council has been housed in the Grade I listed hall, set within 42 acres of gardens and parklands, since 1974 but said it now needed less space and maintenance costs on the building were rising.
For conventional companies, archives are an expensive problem: they need curating, maintenance, storage space, and no-one can ever judge what will be significant in the future.
The charity will also be working with the Edinburgh and Lothian Green Space Trust to identify what paths need conservation or maintenance work to improve the local area.
Salesforce.com is the dominant player in the cloud space whereas SAP is really a traditional software operator, which relies heavily on license and maintenance revenues.
But the program also fuels a less universally welcome attitude about outdoor space that favors tricked-out park amenities over straightforward ones, and flashy attractions over continuing attention to maintenance.