Hi there,
According to the CUCM Disaster Recovery Guide:
Note You set the Administrator username and password during Cisco Unified Communications Manager installation, and you can change the Administrator password or set up a new Administrator account by using the Command Line Interface (CLI). Refer to the Command Line Interface Reference Guide for Cisco Unified Solutions for more information.
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/drs/7_1_2/drsag712.html#wp42149
You can reset the username/password by using the following commands:
utils reset_ui_administrator_name
utils reset_ui_administrator_password
HTH,
Chris
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