Hello everyone, Actually i am looking to set the company for around 1000 external contacts with exchange powershell cmdlet. how can i accomplish this. I am using exchange server 2007 with windows server 2003 R2. What we want to accomplish is as follows imported customers contacts in exchange to send them special offers periodically. The offers will be sent based on product they have. i imported the contacts in exchange. made dynamic distribution group. entered product name in company field as we dont keep the company details of customer's company. this is because i can call the contact from dynamic distribution group based on product as there is no product field in mail contact properties. Now the problem is only that how do i set the company information using exchange cmdlet for all the contacts at the same time. Thanks,MYM

For change attribute in contact you need to get mail contact in an OU and supply this value into set-mailcontact cmdlet. Get-MailContact -OrganizationalUnit "" | Set-MailContact -CustomAttribute9 ???? I did not test it with me, So please test it and then apply to all.Anil

Thanks Anil. This is what i have done just to help out someone who is looking for it step1 import from csv to exchange server using following command Import-Csv Contacts.csv | ForEach { New-MailContact -Name $_.DisplayName -ExternalEmailAddress $_.EmailAddress - OrganizationalUnit "MailContacts" } step 2 add custom attribute 1 to all the customers by their product using the following command get-mailcontact -orginationalunit 'Mcompany.local/mycontactsou' | get-mailcontact -customattribute1 'productName' Step 3 hide the all the contacts from the global address list using the following command get-mailcontact -orginationalunit 'mycompany.local/mycontactsou'| get-mailcontact -hiddenfromaddresslistenabled $True step 4 step5 create dynamic distribution list using EMC After the creation of the dynamic distribution group go the the properties tab of the group and then to the conditions tab and then select custom attribute1. then enter the value as the productName. and then click ok step 6 hidde the dynamic distribution group using the following command get-dynamicdistributiongroup -identity 'DynamicDistributionGroupName' | set-dynamicdistributiongroup - hiddenfromaddresslistenabled $True Thanks Anil for your help.Your post enabled me to complete the task sucessfully MYM