Changing a User's SIP Domain

One of the big projects that we have been working on is re-branding with a global image. This project started with migrating all of our users to have the same email domain and SIP domain. When Lync was initially installed the decision was made to support two SIP domains.

I was lucky and we only had a handful of users that needed to be changed to out primary SIP domain and could make the changes manually. To change a lot of users you could use a script like this. I have not tested this script, so test it first.

$UserList = Get-CsUser -Filter 'SipAddress -like "*olddomain.com"'
foreach ($User in $UserList)
{
   $oldAddress = $User.SipAddress
   $newAddress = $oldAddress -replace "@olddomain.com", "@newdomain.com"
   Set-CsUser -Identity $User.Identity -SipAddress $newAddress
}

Once you change all of the users, you will want to update the Lync and Exchange address books. The changes will update eventually depending on your replication time and when Address Books are scheduled to rebuild, but we want to have as little impact on the users as possible. I ran all of the PowerShell commands just to be on the safe side.

To update the Lync address book:
     Update-CsAddressBook

To update the Exchange address books:
     Update-GlobalAddressList
     Update-OfflineAddressBook

Impacts to the User

• When the change is made, the user will be logged off Lync, and they will need to log in with the new SIP address.
• Internal contacts should update the SIP address automatically – no action required.
• External contacts will have to re-add the user to their contact list.
• Lync Online Meetings will now be scheduled using the new meet web address. Any existing meetings will need to be rescheduled. There will be a delay between the changing of the SIP address and the ability to schedule meetings with the new address. Once you have updated the Exchange Address List and Offline Address Book the users will need to close and relaunch Outlook for this change to be picked up.

~ brad

Fun Fact:

The MS 150 is a two-day, 180-mile fund raising cycling ride organized by the National Multiple Sclerosis (MS) Society: Lone Star chapter. This ride is the largest event of its kind in North America taking in about 13,000 riders each year with a goal of raising $18 million towards finding a cure for MS.
This year's 30th Anniversary ride is scheduled 12-13 April 2014.