Using multiple vaults right from the beginning is recommended for large organizations with several departments that use Autodesk Civil 3D independently. Each department—such as the survey, site, or highway departments—gets its own vault. This structure makes it easier to separately manage departmental permissions and project access.
Each vault can have a separate system administrator, and users can be granted access to only one vault, if necessary. If some users need access to multiple vaults, you must configure their permissions separately for each vault. Also note that users cannot log into more than one vault at a time.
Organizations with very large, multi-phased projects may want to assign a separate vault for each project, for ease of project management. If you elect to partition your data into multiple vaults on a server, your project teams will see shorter project lists and have tighter control over data access. However, there are some disadvantages. Projects reside in different locations and your users have to remember multiple vault names and locations. Also, backing up and maintaining multiple vaults is more work for your IT department.