Lots of DLL's under service/user account Temp folder which is used to configure DEM

One of the users of vRA asked a question on why do we see so many DLL's under Temp folder of a user account configured to run DEM's

Tried to check the same in my environment and found that it's same behavior on my side as well

As shown in the screenshot below DEM Worker and Orchestrator are configured

with a service account named "prem\srv-vra-seven"

Selected one of the DLL's and opened it with notepad ++, not a right tool to open but it did give enough information on what's creating these files under *Temp/*

If we observe the dll , it states that it might be created due to UpdateCatalogWorkflow

UpdateCatalogResource workflow is triggered by DEM

If we observe timestamps in the above screenshot, it's the same time when the folders with the DLL's in them are created

Details of what this UpdateCatalogResource does is present under DEM logs

2020-05-14T08:57:30.473Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="5212"] [sub-thread-Id="15"  context=""  token=""] WorkflowExecutionUnit: initialize started: 7709
2020-05-14T08:57:32.161Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="5212"] [sub-thread-Id="15"  context=""  token=""] The definition of workflow UpdateCatalogResource has been cleaned of designer-specific content: 00:00:01.6766975
2020-05-14T08:57:34.458Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="5212"] [sub-thread-Id="15"  context=""  token=""] WorkflowExecutionUnit: workflow application loaded: 7709
2020-05-14T08:57:34.551Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="5212"] [sub-thread-Id="15"  context=""  token=""] Worker Controller: initialized instance 7709 - UpdateCatalogResource of the workflow execution unit : 00:00:04.8993202
2020-05-14T08:57:34.551Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Debug" thread="5212"] [sub-thread-Id="15"  context=""  token=""] Workflow ID: 7709 Name: UpdateCatalogResource App ID: bf67dd56-a92c-4930-8cf1-8c6a3cbb28bf
2020-05-14T08:57:34.551Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Debug" thread="5212"] [sub-thread-Id="15"  context=""  token=""] Workflow ID: 7709 Argument Name: WorkflowOperation Argument Value: <WorkflowOperation xmlns:i="http://www.w3.org/2001/XMLSchema-instance" z:Id="i1" xmlns:z="http://schemas.microsoft.com/2003/10/Serialization/" xmlns="http://schemas.datacontract.org/2004/07/DynamicOps.ManagementModel">
  <EntityKey xmlns:d2p1="http://schemas.datacontract.org/2004/07/System.Data" z:Id="i2" xmlns="http://schemas.datacontract.org/2004/07/System.Data.Objects.DataClasses">
    <d2p1:EntityContainerName>ManagementModelEntities</d2p1:EntityContainerName>
    <d2p1:EntityKeyValues>
      <d2p1:EntityKeyMember>
        <d2p1:Key>Id</d2p1:Key>
        <d2p1:Value xmlns:d5p1="http://www.w3.org/2001/XMLSchema" i:type="d5p1:int">2737</d2p1:Value>
      </d2p1:EntityKeyMember>
    </d2p1:EntityKeyValues>
    <d2p1:EntitySetName>WorkflowOperations</d2p1:EntitySetName>
  </EntityKey>
  <Id>2737</Id>
  <OperationName>UpdateCatalogResource</OperationName>
  <WorkflowOperationArguments />
</WorkflowOperation>
2020-05-14T08:57:34.817Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <DynamicActivity>: State: Executing 
2020-05-14T08:57:34.911Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <UpdateCatalogResource>: State: Executing 
2020-05-14T08:57:34.926Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <Flowchart>: State: Executing 
2020-05-14T08:57:34.926Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <Create Management Model>: State: Executing 
2020-05-14T08:57:35.551Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <Create Management Model>: State: Closed 
2020-05-14T08:57:35.567Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Debug" thread="8924"] [sub-thread-Id="8"  context=""  token=""] UpdateCatalogResource Workflow: UpdateCatalogByVirtualMachineId.Execute
2020-05-14T08:57:37.786Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <UpdateCatalogByVirtualMachineId>: State: Executing 
2020-05-14T08:57:37.786Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <UpdateCatalogByVirtualMachineId>: State: Closed 
2020-05-14T08:57:37.786Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Management Model: The DeleteWorkflowOperation activity started.
2020-05-14T08:57:38.364Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Debug" thread="8924"] [sub-thread-Id="8"  context=""  token=""] DeleteWorkflowOperation: Deleting workflow operation with id: 2737 and operation name: UpdateCatalogResource
2020-05-14T08:57:38.677Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Management Model: The DeleteWorkflowOperation activity finished.
2020-05-14T08:57:38.677Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <DeleteWorkflowOperation>: State: Executing 
2020-05-14T08:57:38.677Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <DeleteWorkflowOperation>: State: Closed 
2020-05-14T08:57:38.677Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <Flowchart>: State: Closed 
2020-05-14T08:57:38.677Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <UpdateCatalogResource>: State: Closed 
2020-05-14T08:57:38.692Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow ID: 7709 Activity <DynamicActivity>: State: Closed 
2020-05-14T08:57:38.708Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Worker Controller: WorkflowApplication_Completed in child domain.
2020-05-14T08:57:38.708Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Worker Controller: WorkflowApplication_Completed
2020-05-14T08:57:38.708Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Trace" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Worker Controller: ProcessWorkflowCompleted
2020-05-14T08:57:38.708Z SEVENIAAS vcac: [component="iaas:DynamicOps.DEM.exe" priority="Debug" thread="8924"] [sub-thread-Id="8"  context=""  token=""] Workflow Complete:  7709 - Successful

These folders can be deleted and should not impact any of the underlying components.

!!! Hope this helps !!!