My workflow looks for the name in a people picker field and then emails that person. It works for every name I put in the field except for 1 person (that I have seen so far). Does anyone have any idea why this is happening? This is the error I receive from the workflow.

RequestorId: 06262505-fdc3-c27e-0000-000000000000. Details: An unhandled exception occurred during the execution of the workflow instance. Exception details: System.ArgumentNullException: Value cannot be null. Parameter name: Input at Microsoft.Activities.Hosting.Runtime.Subroutine.SubroutineChild.Execute(CodeActivityContext context) at System.Activities.CodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager) at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)

  • Have you checked that user's profile in UPSA? Is it same as any of the other users i.e. are all attributes present? Commented May 28, 2015 at 19:27
  • Does the user have an eMail adress in the userProfile?
    – Nils
    Commented Oct 14, 2016 at 20:10

2 Answers 2


SharePoint 2013 Workflow doesn't send email to an external user alike SharePoint 2010 Workflow.

The user to whom email is send via Workflow might not be synced in the User Profile, so perform a full User Profile Synchronization.

To perform full synchronization use this link.

And if your user is already synced in the User Profile. Check its User Profile Properties whether they are mapped properly or not. And check that WorkEmail property is not blank.

If WorkEmail property is blank, perform manual user sync to AD:

$user = "domain/username"
$syncUser = Get-SPUser -Identity $user -web http://yoursite/
Set-SPUser -Identity $syncUser -SyncfromAD

The reference that SharePoint has for the user may be out of sync with Active Directory. You can run the PowerShell script below to update the user information from AD and then retry the workflow afterwards.

Set-SPUser –Identity "<domain>\<username>" –SyncFromAD –Web http://<name of web app>

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