In some instances, an organization uses a workgroup geodatabase to create multiple maps and layouts in a single project. The maps and layouts may be edited simultaneously by organization members in ArcGIS Pro. However, it is not possible to create a workgroup geodatabase in ArcGIS Pro because the SQL Server Express instance is not available.
As a workaround, create the workgroup geodatabase in ArcMap and connect it to ArcGIS Pro. Connect the workgroup geodatabase to ArcGIS Pro using the ArcSDE connection file from ArcMap, or by creating a new direct database connection to the SQL Server Express instance. Follow the instructions described below: