Powershell - Group membership with mapping table


I have a list of users that need to be added to a a security group in AD depending on some kind of mapping table.

Mapping table example:

Gender, Department, Security Group
M, HR, Group 1
F, HR, Group2
M, Finance, Group 3
F, Finance, Group 4

Note: This is just an example

So I have a list of users where I can read the gender en department from the object and I need to add them to a corresponding group according to the mapping table.
If this mapping table is changed, the group membership should changed dinamically.

What would be the easiest approach fir this?
I don't like to have a lot of if statements as the mapping table is very big.

Who is Participating?
footechConnect With a Mentor Commented:
Below is an example that should work.  You'll need to do your own testing.
Users retrieved from AD must have a Gender attribute (not standard) for this code to work unmodified.  Remove the -WhatIf to run for real.
$mapping = @"
M,HR,Group 1
F,HR,Group 2
M,Finance,Group 3
F,Finance,Group 4
"@ -split "\r?\n" | ConvertFrom-Csv

Get-ADUser -Filter * -Properties Gender,Department | ForEach `
    $user = $_
    Compare-Object -ReferenceObject $mapping -DifferenceObject $user -Property Gender,Department -IncludeEqual -ExcludeDifferent -PassThru | ForEach `
        $group = Get-ADGroup $_.SecurityGroup
        Get-ADUser $user.samAccountName | Add-ADPrincipalGroupMembership -MemberOf $group -WhatIf

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Jose Gabriel Ortega CCEO J0rt3g4 Consulting ServicesCommented:
And where do you get the name of the people?

So the process would be?
Take the name of the people somewhere and get the mapping table finally do the Add/remove from groups?

I mean that table is for all users? (since they have different genders)... ? the problem is not clear try to reformulate your question.

The way I am reading this it would not be very easy or efficient to accommodate this.

If I am reading this question correctly, you have a list of

Gender, Department, Security Group
M, HR, Group 1
F, HR, Group2
M, Finance, Group 3
F, Finance, Group 4

and you want to be able to make modifications to that "list" and it dynamically change the attributes for that user/s in Active Directory?

Please confirm this.
Creating Active Directory Users from a Text File

If your organization has a need to mass-create AD user accounts, watch this video to see how its done without the need for scripting or other unnecessary complexities.

alohadinSEAuthor Commented:
Ok, it would go like this:

Get all users from AD.
In the user objects I read the gender and department attributes.

If (Gender = F -and Department=HR){
 Ad user to AD Group "Group2"

and so on...

The mapping table basically defines in which security group the user would be added depending on Gender and Department.
If that mapping table changes in a couple of months (e.g. a new Department is introduced or a condition is changed), the script should add the users to the groups according to the new mapping table
Jose Gabriel Ortega CCEO J0rt3g4 Consulting ServicesCommented:
I would suggest you a gig for this.
alohadinSEAuthor Commented:
Nah, I already figured it out.

I combined the columns Gender and Department into one so I wold have two columns then converted it to a hashtable and used that for lookup.

I'll post the script when it's finished.
Still have a couple of things to change.
alohadinSEAuthor Commented:

This works perfectly.
I just tested it and it works perfectly fine!
Never thought of using the compare-object cmdlet

Thank you
Glad it works.

The method you mentioned of combining the two columns so that you essentially have unique values that you can use as keys in a hashtable is also a good one.
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