It might be the case you want to flow a NULL value into some attribute, or in other words clearing an attribute value, when meeting some condition.
In the sync rules a "Null()" function exists, which might give you the idea that it flows a NULL value. Au contraire, mon ami! The "Null()" function basically means "do nothing". One of the examples of using that function is in combination with the "IIF()" function. The "IIF()" function translates into "If…Then…Else". Sometimes, you just want to have "If…Then" and you do not care about the “Else”, and that’s when you use the "Null()" function when using the “IIF()” function.
IIF(Eq(X,"1"),Y,Null()) ==> Z
If X=1 then Z=Y
So, how do you clear a value in the FIM/MIM Portal? It is not possible by default, therefore you need a custom workflow activity to do that for you.
On codeplex you will find Soren Granfeldt’s "FIM 2010 Granfeldt Workflow Activity Library". This Activity Library is a collection of generic custom workflows for use with FIM 2010 R1/R2 and MIM 2016. The purpose of this collection of workflow activities is to have activities that can solve the most common tasks in a traditional FIM installation – in one library.
As you can read in the documentation, it now supports an activity to clear an attribute value from the specified attribute. However, when downloading the activity, the old activity that does support this is still targeted for download. A workaround for this is to use the Code Run activity.
After adding the “Code Run” activity to the workflow:
- Enter something in the “Title” field explaining what it does
- In the “References (DLL’s)” field enter: System.dll
- No need to specify anything in the “Parameters” field
- In the “Code” field specify the following code:
public class FIMDynamicClass
public static object FIMDynamicFunction()
- In the “Destination” field specify the targeted attribute for which its value must be cleared using the format: [//Target/<Attribute>] where <Attribute> is replaced with the attribute you need to be cleared
Figure 1: Clearing An Attribute Using The Code Run Activity In Soren Granfeldt’s "FIM 2010 Granfeldt Workflow Activity Library"
You can also use the MIM WAL activity to do the same which is available on Github. The MIMWAL is a Workflow Activity Library (WAL) solution for configuring complex Workflows in the Microsoft Identity Manager (MIM) 2016 and Forefront Identity Manager (FIM) 2010 R2 solution.
After adding the “Update Resources” activity to the workflow:
- Enter something in the “Activity Display Name” field explaining what it does
- No need to use the advanced features of the activity
- In the “Value Exprssion” field specify 2 quotes ""
- In the “Target” field specify the targeted attribute for which its value must be cleared using the format: [//Target/<Attribute>] where <Attribute> is replaced with the attribute you need to be cleared
- Make sure to check “Allow Null”
Figure 2: Clearing An Attribute Using The Update Resources Activity In The MIMWAL (MIM Workflow Activity Library)
* This posting is provided "AS IS" with no warranties and confers no rights!
* Always evaluate/test yourself before using/implementing this!
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