Overview of a Gradual Migration from Cisco Unity to Cisco Unity Connection 9.x
Before you begin to gradually migrate users and other data from Cisco Unity to Cisco Unity Connection, familiarize yourself with the following conceptual and procedural documentation related to the migration:
- Documentation on the Cisco Unified Backup and Restore Application Suite (COBRAS), which you use to migrate data. See:
– COBRAS Help at . .
– Training videos for using COBRAS Help, also at . .
See the following sections:
How Migrated Messages Can Exceed Available Disk Space on the Unity Connection 9.x Server
We discourage migrating messages from Cisco Unity to Unity Connection. Like Exchange, Unity Connection supports single-instance messaging, meaning that when a message is sent to a distribution list, only one copy is stored. However, COBRAS cannot retain single-instance messaging for a migration, so for every message sent to a distribution list and migrated to Unity Connection, the Unity Connection database contains one copy of the message for each recipient. For example, if you send a Cisco Unity voice message to a distribution list that has 10 members and then migrate that message to Unity Connection, the Unity Connection database will contain 10 copies of the message.
To complicate matters further, there is no way to estimate the total size of all voice messages when messages to distribution lists are expanded from single-instance messaging. As a result, you can easily fill the hard disk on the Unity Connection server with migrated messages.
COBRAS never migrates secure messages, faxes, or receipts.
When Unity Connection networking is configured and you run COBRAS Import for Unity Connection 7.x and Later, COBRAS starts automatically in Hot Mode, the mode for gradually migrating Cisco Unity subscribers to Unity Connection. Hot Mode does not include an option to migrate messages. If you want to migrate messages, you must:
a. Run COBRAS export to export the messages from Cisco Unity before you migrate Cisco Unity subscribers to Unity Connection.
b. Run COBRAS import to import messages into Unity Connection after you migrate subscribers.
The task list indicates when to perform these steps, if applicable.
About the Behavior of Mailbox Synchronization If You Migrate Messages (Unity Connection 9.x)
As noted in the “How Migrated Messages Can Exceed Available Disk Space on the Unity Connection 9.x Server” section, we discourage migrating messages. However, if you must migrate messages from Cisco Unity to Unity Connection 8.5 or later, and if you configure Unity Connection and Exchange mailbox synchronization (single inbox), note the following:
- Migrated messages will appear in the Unity Connection mailbox and in the Exchange mailbox for each user.
- COBRAS retains the read/unread status of the migrated messages. If a user played a message in Cisco Unity before the message was migrated, the message will be read both in Unity Connection and in the Exchange mailbox.
- If you migrate messages for the same Cisco Unity subscriber more than once, the corresponding Unity Connection user will have one more copy of each migrated message in Unity Connection and in Exchange for each additional migration attempt.
If the Cisco Unity server is configured as unified messaging, we further discourage migrating messages because of the following behaviors.
- Two copies of migrated messages will appear in the Exchange mailbox for each user: the original message and the migrated message that is synchronized into the Exchange mailbox when single inbox is configured.
- If a user uses Outlook to play the original message in Exchange (the copy that Cisco Unity put into Exchange when the message was received), the message will remain unread in Unity Connection, and the message waiting indicator will remain on. This only happens with migrated messages. Playing the migrated message (the copy that was synchronized into the Exchange mailbox by the single inbox feature) or playing messages that are received after the migration will turn off the message waiting indicator on the new extension as appropriate.
In only one configuration must you migrate messages: you configured secure messaging for Cisco Unity subscribers, and you want the corresponding Unity Connection users to be able to use Cisco Unity Connection ViewMail for Microsoft Outlook to play messages from the Cisco Unity server after the migration. In this configuration, you must also upgrade to Cisco Unity Connection ViewMail for Microsoft Outlook version 8.5 because Cisco Unity ViewMail version 8.0 cannot access secure messages in Unity Connection, and Cisco Unity Connection ViewMail for Microsoft Outlook version 8.5 cannot access secure messages in Cisco Unity.
How the Migration Affects Cisco Unity Subscribers
As Cisco Unity subscribers are migrated to Unity Connection, their primary extensions are prefixed with an alphabetical string. This has the following effects:
- The migrated subscribers can no longer call the old pilot number to access their old Cisco Unity voice messages because their extension is now associated with their Unity Connection mailbox.
- To allow migrated users to access their Cisco Unity voice messages using the telephone user interface, you must configure a new pilot number and create a Direct Calls routing rule that routes calls to the Sign-In Archived Mailbox conversation. This conversation allows users to access messages on the Cisco Unity server by entering their old Cisco Unity primary extension.
For more information, see the “About the Behavior of Mailbox Synchronization If You Migrate Messages (Unity Connection 9.x)” section.
- The migrated subscribers are no longer listed in the Cisco Unity directory.
- Subscribers who have not been migrated can no longer send messages to the Cisco Unity mailbox of subscribers who have been migrated.
- Cisco Unity notification devices (for example, message waiting indicators) are disabled for migrated subscribers.
- Alternate extensions for migrated subscribers are deleted.
Removing Cisco Unity Data from Active Directory
Depending on the Cisco Unity configuration, after the migration is complete, you may want to remove Cisco Unity–specific attributes from Active Directory accounts or delete the Active Directory accounts by using the Uninstall Unity tool, the Bulk Subscriber Delete tool, or both. Regardless of the method you use for removing Cisco Unity–specific attributes or removing Active Directory accounts, after you migrate the last Cisco Unity subscriber from a given Cisco Unity server to Unity Connection, you should still run Uninstall Unity on the server to remove Cisco Unity objects from Active Directory.
In a Unified Messaging configuration, you can remove Cisco Unity–specific attributes from Active Directory accounts by using either the Bulk Subscriber Delete tool in Tools Depot or by using the Uninstall Unity utility. Bulk Subscriber Delete is useful if you want to remove attributes as you migrate subscribers. Uninstall Unity cannot be used until you have migrated all subscribers because you cannot select the subscribers for which attributes are removed from Cisco Unity; the tool removes Cisco Unity attributes from Active Directory accounts for all of the Cisco Unity subscribers who are homed on the current server.
In a Voice Messaging configuration for which you created duplicate Active Directory accounts in the corporate forest for Cisco Unity subscribers, you will probably want to remove the Active Directory accounts, not just Cisco Unity–specific attributes. To remove Active Directory accounts, you must use the Bulk Subscriber Delete tool.
In a Voice Messaging configuration for which you created a separate forest, removing Active Directory attributes and accounts is unnecessary if you are going to reinstall the operating system on the Cisco Unity servers and on the domain controllers and global catalog servers.
Task List for Migrating from Cisco Unity to Unity Connection 9.x by Gradually Moving Data
Use the following high-level task list to gradually migrate to Unity Connection 9.x correctly. The tasks reference detailed instructions in this guide and in other Unity Connection documentation as noted. Follow the documentation for a successful migration.
1. Review the “Requirements for Migrating from Cisco Unity to Cisco Unity Connection Version 9.x” section of System Requirements for Cisco Unity Connection Release 9.x at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/9x/requirements/9xcucsysreqs.html .
2. Prepare the Cisco Unity servers for the migration:
a. Upgrade one or more Cisco Unity servers to Cisco Unity 9.x as necessary to satisfy the requirements listed in the System Requirements for Cisco Unity Connection Release 9.x .
b. Install the engineering specials that allow gradual migration of Cisco Unity 5.x or 7.x servers in a Unity Connection networking site, if applicable.
3. Obtain and intsall the licenses in the ELM server. For details on obtaining and installing the licenses in the ELM server, see the "New License Fulfillment" section in the ELM user guide at http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/elmuserguide/9_0_1/CUCM_BK_E596FD72_00_enterprise-license-manager-user-90.html For more information on Cisco Unity Connection 9.0 Licenses, see the “Managing Licenses in Cisco Unity Connection” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/9x/administration/guide/9xcucsagx.html .
4. Install one or more Unity Connection 9.x servers, if applicable, and upgrade all existing Unity Connection servers, if any, to version 8.x. For information on:
– Installing new Unity Connection 9.x servers, see the Installation Guide for Cisco Unity Connection Release 9.x at . .
– Upgrading from Unity Connection 7.x to 9.x, see the chapter. chapter.
5. See the applicable version of Release Notes for Cisco Unity Connection for additional information on the shipping version of Cisco Unity Connection. In particular, note the items in the section “Installation and Upgrade Information.” Release notes are available at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/7x/release/notes/701cucrn.html .
6. Download the following tools:
– The Cisco Unity Disaster Recovery Backup tool, available at . .
– The COBRAS Import for Unity Connection 7.x and Later tool, available at . .
– If you want to migrate voice messages from Cisco Unity to Unity Connection: The COBRAS Export for Unity tool, available at . .
Note The COBRAS page at CiscoUnityTools.com includes several versions of COBRAS. Take care to download the correct versions.
– If you want to remove subscriber data from the Cisco Unity database and attributes for Cisco Unity subscribers from Active Directory as you migrate subscribers: The Bulk Subscriber Delete tool, available at . .
– If Cisco Unity attributes and objects are stored in the corporate directory: The Uninstall Unity tool, available at . .
7. On the first Cisco Unity server, install the tools that you downloaded in Step 6., including COBRAS Import for Unity Connection 7.x.
When Cisco Unity failover is configured:
– Install the Cisco Unity Disaster Recovery Backup tool on the secondary server.
– Install all other tools on the active server, regardless of whether the active server is the primary or secondary server.
8. Set up Unity Connection networking. For more information, see the “Setting Up Networking Between Cisco Unity and Cisco Unity Connection 9.x Servers” chapter of the Networking Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/9x/networking/guide/9xcucnetx.html .
9. Confirm that the Cisco Unity server that you are migrating to Unity Connection can ping the Cisco Unity site gateway to the Unity Connection site.
10. Back up the Cisco Unity server by using the Cisco Unity Disaster Recovery tools. This backup will not be used to migrate data to the Unity Connection 8.x system; we recommend it only so you can revert to Cisco Unity if necessary.
11. If you want to migrate voice messages from Cisco Unity to Unity Connection: Export data and voice messages by using COBRAS Export for Unity.
12. If you do not to migrate voice messages from Cisco Unity to Unity Connection: Configure access for migrated users to their old voice messages on the Cisco Unity server:
a. On the phone system, set up a new voicemail pilot number that calls Cisco Unity.
b. In Cisco Unity Administrator, in the Direct Calls call routing table, add a direct routing rule to the top of the routing table. Configure the new routing rule to respond to calls from the pilot number that you set up in Task 12.a., and route calls to the Sign-In Archived Mailbox conversation, which gives migrated users access to their old Cisco Unity mailbox. The conversation prompts callers to enter their Cisco Unity primary extension and PIN.
Alternate extensions are all deleted when a subscriber is migrated, so subscribers cannot use alternate extensions to access archived mailboxes.
13. Give the following information to the Cisco Unity subscribers you are about to migrate:
– Accessing their new voice messages in Unity Connection.
– If you do not to migrate voice messages from Cisco Unity to Unity Connection:12.a. Accessing their old Cisco Unity voice messages by using the pilot number that you set up in Task
14. Use COBRAS to migrate Cisco Unity subscribers to Unity Connection.
If you are configuring single inbox, and if Cisco Unity is configured as unified messaging, so Unity Connection voice messages that are synchronized to Exchange will be saved in the same mailbox that Cisco Unity voice messages are stored in now, we recommend that you select the Include Corporate Email Addresses from Backup for New User Creation checkbox in COBRAS. When you restore Cisco Unity data on the Unity Connection server, the Exchange email addresses associated with Cisco Unity users will be saved in the Corporate Email Address field on the User Basics page in Cisco Unity Connection Administration. This will simplify configuration of single inbox later in the migration process.
For more information, see Help for the tool at http://www.ciscounitytools.com/Applications/General/COBRAS/COBRAS.html .
Caution Do not migrate subscribers during normal business hours. Cisco Unity subscribers who are being migrated to Unity Connection can access neither their archived messages in Cisco Unity nor their new messages in Unity Connection while they are being migrated. In addition, even after they have been migrated, they cannot access new messages until you have reconfigured their phone or the phone system as explained in Task
15. Reconfigure the phone or the phone system to:
– Route calls to Unity Connection when the extension for the user is busy or the user does not answer.
– Route calls to Unity Connection when the user presses the Messages button, if applicable.
16. Wait for information on all of the migrated subscribers to replicate:
– Cisco Unity subscribers that have been migrated to Unity Connection no longer appear in Cisco Unity Administrator.
– In Connection Administration, users that have been migrated from Cisco Unity appear as regular users. (Before the migration starts, they appear as contacts. While the migration is occurring, they appear both as contacts and as users.)
17. If you want to migrate voice messages from Cisco Unity to Unity Connection:
a. Install COBRAS Import for Unity Connection 7.x and later on a Windows computer other than the Cisco Unity server. COBRAS Import can be run from the Cisco Unity server, but it runs better on a computer on which Cisco Security Agent for Cisco Unity is not running.
b. Run COBRAS Import to import voice messages into Unity Connection for the migrated users. For more information, see Help for the tool at http://www.ciscounitytools.com/Applications/General/COBRAS/COBRAS.html .
18. Optionally, remove migrated Cisco Unity subscribers by using the Bulk Subscriber Delete tool in the Administration Tools folder in Tools Depot. Bulk Subscriber Delete removes selected subscribers from the Cisco Unity database and lets you choose one of the following options:
– Remove Cisco Unity-specific properties for the selected subscribers from Active Directory.
– Remove Active Directory account and the Exchange mailbox for the selected subscribers.
For more information, see:
– Help for the tool at . .
– The “Removing Cisco Unity Data from Active Directory” section.
19. Repeat Task 13. through Task 18. to migrate the remaining Cisco Unity subscribers on this server to Unity Connection.
20. If Cisco Unity attributes and objects are in the corporate directory: Uninstall Cisco Unity, which removes Cisco Unity attributes and objects from Active Directory. For more information, see the “Removing Cisco Unity Data from Active Directory” section.
21. Repeat Task 7. through Task 20. to migrate subscribers on the remaining Cisco Unity servers to Unity Connection.