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How to script the addition and removal of Distribution Group Members

Posted on 2008-06-25
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Last Modified: 2008-07-18
We're running Exchange 2007 SP1 on a Windows 2003 SP2 server.  We have 3 Distribution Groups that are updated on a weekly basis.  Each Distribution Group only has one member in it.  The Distribution Groups are named: 1st on call, 2nd on call, 3rd on call.  Every Friday, the member that was in the 3rd on call group, moves to 2nd on call.  The member from 2nd on Call, moves to 1st on call.  The member of 1st on call gets removed from the rotation.  

I'm looking for a way to somewhat automate the task of updating these distribution groups.  I've been looking around and found a Powershell script that will import members from a csv file.  But I haven't found a way to remove the member from one group and place them into another.  Below is the sample code I found on this site (I'd credit the author but couldn't find the post again):
import-csv dlmember.csv | foreach {add-distributiongroupmember -identity "dist group name" -member $_.memberAlias}

Any help is greatly appreciated.  Also, this script doesn't have to pull from a csv file if not needed, this is just what I have found so far.  Please let me know if there's need for further clarification

Thanks in advance.
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Question by:dmorrisroe
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LVL 18

Expert Comment

by:BSonPosh
ID: 21869223
I think this will do it for you (if my logic isnt confused :) )
# Collect Group Members and store in the New Group Collection
$callGroup1 = Get-DistributionGroupMember "3rd on call"
$callGroup2 = Get-DistributionGroupMember "1st on call"
$callGroup3 = Get-DistributionGroupMember "2nd on call"
 
# Add users for new Collection to Groups
$callgroup1 | %{$_.distinguishedname} | Add-DistributionGroupMember "1st on call"
$callgroup2 | %{$_.distinguishedname} | Add-DistributionGroupMember "2nd on call"
$callgroup3 | %{$_.distinguishedname} | Add-DistributionGroupMember "3rd on call"

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LVL 18

Expert Comment

by:BSonPosh
ID: 21869244
btw... if the group membership is static.

Perhaps a better way is renaming the groups... This would save a potentially significant amount of AD replication.
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LVL 4

Author Comment

by:dmorrisroe
ID: 21869309
Thanks, I'll give the script a try in about a half an hour.  Unfortunately, membership isn't static.  It's a rotation of about 5 people.
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LVL 18

Expert Comment

by:BSonPosh
ID: 21910299
How did this work out for you?
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LVL 1

Expert Comment

by:Robert Davis
ID: 21960860
I am wondering the same thing....
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Author Comment

by:dmorrisroe
ID: 22006587
sorry for the delay.  I ran the script but none of the distribution list had changed.  
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Accepted Solution

by:
BSonPosh earned 500 total points
ID: 22007898
any error? It is unlikely that it failed without an error of some sort.

Run this script

# Collect Group Members and store in the New Group Collection
$callGroup1 = Get-DistributionGroupMember "3rd on call"
$callGroup2 = Get-DistributionGroupMember "1st on call"
$callGroup3 = Get-DistributionGroupMember "2nd on call"
 
# Add users for new Collection to Groups
$callgroup1 | %{$_.distinguishedname} | Add-DistributionGroupMember "1st on call"
$callgroup2 | %{$_.distinguishedname} | Add-DistributionGroupMember "2nd on call"
$callgroup3 | %{$_.distinguishedname} | Add-DistributionGroupMember "3rd on call"
 
if(!$?){$error[0]}

Open in new window

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LVL 4

Author Comment

by:dmorrisroe
ID: 22011213
Sorry, it's was on my part.  The error read: Add-DistributionGroupMember : The group "1st on call" is not a mail-enabled u
niversal group.  I made it universal and it started to switch members.  However, it moved them like this:
1st to 2nd
2nd to 3rd
3rd to 1st.

I think I should be able to flip that around.
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LVL 18

Expert Comment

by:BSonPosh
ID: 22011269
k
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