After you begin the migration and upgrade process, you cannot back out of it. If you want to go back to the previous release, you must restore your VMs from your backup.

You can upgrade only to Cisco Packaged CCE 2000 Agents deployment, Release 12.0(1) from Release 11.5(x), or 11.6(x) directly. To upgrade from the releases 11.0(x), you must first upgrade to 11.5 and then upgrade to 12.0. To upgrade from releases earlier than 11.0(1), you must first upgrade to 11.0(1) and then upgrade to 11.5(1).

Upgrade to release requires Windows update KB2919355 (Hotfix). If you applied a Windows update since March 2014, install this Windows update. To determine if this Windows Hotfix is installed, from your Control Panel go to Programs > Programs and Features. Click View installed updates.

Before you upgrade the Cisco VOS-based servers such as the Live Data server, check the Check and upgrade VMware Tools before each power on box in the VM's Options > Edit Settings.

For more information on VMware Tools upgrade, see the VMware documentation.

Before upgrading, close all the open Microsoft Windows Event Viewer instances. This prevents an installation failure with an error that the following DLLs are locked:

• icrcat.dll

• icrmsgs.dll

• snmpeventcats.dll

• snmpeventmsgs.dll

If the failure occurs, close the Event Viewer and retry the installation. If the failure persists, restart the Microsoft Windows Event Log service.

This release contains an updated database schema. During the upgrade process, perform a schema upgrade using the Enhanced Database Migration Tool (EDMT).

For the upgrade utilities, see https://software.cisco.com/download/type.html?mdfid=268439622

Make sure that you have backups of all components in both Side A and Side B before you begin your upgrade. You can take a snapshot of the virtual machines on which you are performing the upgrade.

After you configure the servers, you can move the VMs to the servers and complete the common ground upgrade.

Optionally, you can stage the Unified CCE Rogger off box before you begin the migration and upgrade to lessen your downtime.

If you already have a SocialMiner added in the remote site, delete SocialMiner from the remote site and add it as an External Machine in the main site. For more information on how to delete and add an external machine, see the Cisco Packaged Contact Center Enterprise Administration and Configuration Guide at https://www.cisco.com/c/en/us/support/customer-collaboration/packaged-contact-center-enterprise/products-maintenance-guides-list.html.

Make sure that you are running the minimum supported version of ESXi. For information about supported ESXi versions, see the Virtualization for Cisco Packaged CCE at https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/uc_system/virtualization/pcce_virt_index.html.

Server for NIS Tools is not supported when you upgrade the system to Microsoft Windows Server 2016. Therefore, remove the Server for NIS Tools feature from Server Manager before upgrading the system. To do that:

1. Go to Server Manager and open Remove Roles and Features Wizard.

2. On the Remove Features page, expand Remote Server Administration Tools > Role Administration Tools > AD DS and AD LDS Tools > AD DS Tools.

3. Uncheck Server for NIS Tools [DEPRECATED] and continue with the wizard.

Following the upgrade of Packaged CCE, wait for a few minutes for the system to finish loading before logging in to the Unified CCE Administration console.