Migration to Skype for Business Server 2019
Skype For Business
Frank -
2:02 PM

Are we done so soon? Well, for me this seemed all too quick, but it looks like we’re in the last phase in your migration to Skype for Business Server 2019! If you are joining us for the first time, I highly recommend you check our Phases 1-7 here, as this article won’t make much sense without it 🙂

Phase 8: Decommission legacy pools

You’ve made it to the last phase! Phase 8 will discuss how to decommission your legacy Lync Server 2013 or Skype for Business Server 2015 pools. This will consist of updating DNS entries, moving the Content Management Server, decommissioning pools, and deactivating and removing servers and pools from a legacy deployment. Please note though, that not all of the procedures listed in this section are required. If you are interested in extensive documentation on decommissioning a deployment, please refer to the documentation here. Otherwise, just hang tight and I’ll give you the abbreviated version.

Important: For information on migrating and upgrading Microsoft Unified Communications Managed API (UCMA) applications, before decommissioning your legacy environment, see UCMA applications: Coexistence, migration, and upgrade scenarios. 

 

Updating DNS Records

To successfully complete this procedure, you should be logged on to the server or domain as a member of the Domain Admins group or a member of the DnsAdmins group. Below are the steps that should be taken to update your DNS records after you have finished your migration to Skype for Business Server 2019.

  1. On the DNS server, click Start, click Administrative Tools, and then click DNS.
  2. In the console tree for your SIP domain, expand Forward Lookup Zones, expand the SIP domain in which Skype for Business Server 2019 is installed, and navigate to the _tcp setting.
  3. In the right pane, right-click _sipinternaltls and select Properties.
  4. In Host offering this service, update the host FQDN to point to the Skype for Business Server 2019 pool.
  5. Click OK.

 

Verifying that the FQDN of the Front-End pool or Standard Edition server can be resolved

  1. Log on to a client computer in the domain.
  2. Click Start, and then click Run.
  3. In the Open box, type cmd, and then click OK.
  4. At the command prompt, type nslookup <FQDN of the Front-End pool> or <FQDN of the Standard Edition server>, and then press ENTER.
  5. Verify that you receive a reply that resolves to the appropriate IP address for the FQDN.
  • After migrating to Skype for Business Server 2019, and before you can remove the legacy server, you need to move the Central Management Server to the Skype for Business Server 2019 Front End Server or pool. The Central Management Server is a single master/multiple replica system, where the read/write copy of the database is held by the Front End Server that contains the Central Management Server. After you have successfully moved the Central Management Server, you should remove the Central Management Server databases from the original Front End Server. For information on removing the Central Management Server databases, see Remove the SQL Server database for a Front End pool.
    • You use the Windows PowerShell cmdlet Move-CsManagementServer in the Skype for Business Server Management Shell to move the database from the legacy install SQL Server database to the Skype for Business Server 2019 SQL Server database, and then update the SCP to point to the Skype for Business Server 2019 Central Management Server location.

 

Preparing an Enterprise Edition Front End pool

  1. On the Skype for Business Server 2019 Enterprise Edition Front End pool where you want to relocate the Central Management Server, log on to the computer where the Skype for Business Server Management Shell is installed as a member of the RTCUniversalServerAdmins group. You must also have SQL Server database sysadmin user rights and permissions on the database where you want to install the Central Management store.
  2. Open the Skype for Business Server Management Shell.
  3. To create the new Central Management store in the Skype for Business Server 2019 SQL Server database, in the Skype for Business Server Management Shell, type: Install-CsDatabase -CentralManagementDatabase -SQLServerFQDN <FQDN of your SQL Server> -SQLInstanceName <name of instance>

  4. Confirm that the status of the Skype for Business Server Front-End service is Started.

 

Preparing a Standard Edition Front End Server

  1. On the Skype for Business Server 2019 Standard Edition Front End Server where you want to relocate the Central Management Server, log on to the computer where the Skype for Business Server Management Shell is installed as a member of the RTCUniversalServerAdmins group.

  2. Open the Skype for Business Server Deployment Wizard.
  3. In the Skype for Business Server Deployment Wizard, click Prepare first Standard Edition server.
  4. On the Executing Commands page, SQL Server Express is installed as the Central Management Server. Necessary firewall rules are created. When the installation of the database and prerequisite software is completed, click Finish.
  5. To create the new Central Management store on the Skype for Business Server 2019 Standard Edition Front End Server, in the Skype for Business Server Management Shell, type: Install-CsDatabase -CentralManagementDatabase -SQLServerFQDN <FQDN of your Standard Edition Server> -SQLInstanceName <name of instance - RTC by default>

  6. Confirm that the status of the Skype for Business Server Front-End service is Started.

Note: The initial installation may take some time with no visible updates to the command output summary screen. This is due to the installation of SQL Server Express. If you need to monitor the installation of the database, use Task Manager to monitor the setup.

 

Moving the legacy installs Central Management Server to Skype for Business Server 2019 

  1. On the Skype for Business Server 2019 server that will be the Central Management Server, log on to the computer where the Skype for Business Server Management Shell is installed as a member of the RTCUniversalServerAdmins group. You must also have the SQL Server database administrator user rights and permissions.

  2. Open Skype for Business Server Management Shell.

  3. In the Skype for Business Server Management Shell, type:

    Enable-CsTopology

    CAUTION: If Enable-CsTopology is not successful, resolve the problem preventing the command from completing before continuing. If Enable-CsTopology is not successful, the move will fail and it may leave your topology in a state where there is no Central Management store.

  4. On the Skype for Business Server 2019 Front End Server or Front-End pool, in the Skype for Business Server Management Shell, type:

    Move-CsManagementServer

  5. Skype for Business Server Management Shell displays the servers, file stores, database stores, and the service connection points of the Current State and the Proposed State. Read the information carefully and confirm that this is the intended source and destination. Type Y to continue, or N to stop the move.

  6. Review any warnings or errors generated by the Move-CsManagementServer command and resolve them.
  7. On the Skype for Business Server 2019 server, open the Skype for Business Server Deployment Wizard.
  8. In Skype for Business Server Deployment Wizard, click Install or Update Skype for Business Server System, click Step 2: Setup or Remove Skype for Business Server Components, click Next, review the summary, and then click Finish.
  9. On the legacy install server, open the Deployment Wizard.
  10. In Skype for Business Server Deployment Wizard, click Install or Update Skype for Business Server System, click Step 2: Setup or Remove Skype for Business Server Components, click Next, review the summary, and then click Finish.
  11. Reboot the Skype for Business Server 2019 server. This is required because of a group membership change to access Central Management Server database.
  12. To confirm that replication with the new Central Management store is occurring, in the Skype for Business Server Management Shell, type: 
    Get-CsManagementStoreReplicationStatus

    Note: The replication may take some time to update all current replicas.

 

Removing legacy install Central Management store files after a move

  1. On the legacy install server, log on to the computer where the Skype for Business Server Management Shell is installed as a member of the RTCUniversalServerAdmins group. You must also have the SQL Server database administrator user rights and permissions.

  2. Open Skype for Business Server Management Shell

    CAUTION: Do not proceed with the removal of the previous database files until replication is complete and is stable. If you remove the files prior to completing replication, you will disrupt the replication process and leave the newly moved Central Management Server in an unknown state. Use the cmdlet Get-CsManagementStoreReplicationStatus to confirm the replication status.

  3. To remove the Central Management store database files from the legacy, install Central Management Server, type: 
    Uninstall-CsDatabase -CentralManagementDatabase -SqlServerFqdn <FQDN of SQL Server> -SqlInstanceName <Name of source server>

    For example:

    Uninstall-CsDatabase -CentralManagementDatabase -SqlServerFqdn sql.contoso.net -SqlInstanceName rtc

    Where the <FQDN of SQL Server> is either the legacy install Back End Server in an Enterprise Edition deployment or the FQDN of the Standard Edition server.

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