Bulk Assign Workspace Capacity

Hi taran42 

You can bulk assign the workpsaces.

1. I would first get the capacity ID's. Get Capacities As Admin
   https://learn.microsoft.com/en-us/rest/api/power-bi/admin/get-capacities-as-admin
   take the specific Capacity ID you want to assign the workspaces to.
2. Then get the workpsace ID's and map to your excel document. 
   Groups GetGroupsAsAdmin
   https://learn.microsoft.com/en-us/rest/api/power-bi/admin/groups-get-groups-as-admin
3.  When you have the workspace ID's and specific Capacity to which you want to assign the workspaces, use the Admin - Capacities AssignWorkspacesToCapacity to assign the workspaces in bulk.
   https://learn.microsoft.com/en-us/rest/api/power-bi/admin/capacities-assign-workspaces-to-capacity
   replace the CapacityID and WorkspacesID's in the script below
   {
   "capacityMigrationAssignments": [
   {
   "targetCapacityObjectId": "CapacityID",
   "workspacesToAssign": [
   "WorkspaceID1"
   ,"WorkspaceID2"
   ,...
   ]
   }
   ]
   }