If you require modifying the external database for CUCM, there are several steps that need to be followed:

1. Change database server name

a. External server setup -> External databases

2. Unassign servers and disable persistent chat

a. Messaging -> Group Chat and Persistent Chat

b. Change "Persistant Chat Database Assigntment" to unsassigned

c. Uncheck "Enable Persistant Chat" and Save

3. Assign servers and enable persistent chat

a. Messaging -> Group Chat and Persistent Chat

b. Change "Persistant Chat Database Assigntment" to assigned

c. Check "Enable Persistant Chat" and Save

4. Restart Cisco XCP Router

5. Start XCP Text Conference Manager

This blog post provided assistance in understanding the procedure: http://collabtechnotes.blogspot.com/2015/07/postgre-sql-cisco-xcp-message-archiver.html

If you have more questions about Cisco Routers and Cisco Switches. You could contact us www.hi-network.com  (Email: [email protected])