You need to delete an auto-registration Cisco Unified Communications Manager group for a cluster. What should you do?
A. Remove the Cisco Unified CallManager group devices.
B. Disable auto-registration settings in the Cisco Unified CallManager group.
C. Assign a different call group as the auto-registration Cisco Unified CallManager group.
D. Delete the auto-registration Cisco Unified CallManager group without performing any action.
You need to delete an auto-registration Cisco Unified Communications Manager group for a cluster not to disable.
Answer is C
This question is a bit confusing but I agree, answer C. you’re just removing the one specific CUCM Group as the one auto-registration group and assigning a different one.
Auto-registration Cisco Unified Communications Manager Group:
Check the Auto-registration Cisco Unified Communications Manager Group check box if you want this Cisco Unified Communications Manager group to be the default Cisco Unified Communications Manager group when auto-registration is enabled.
Leave this check box unchecked if you do not want devices to auto-register with this Cisco Unified Communications Manager group.
Tip Each Cisco Unified Communications Manager cluster can have only one default auto-registration group. If you choose a different Cisco Unified Communications Manager group as the default auto-registration group, that is, you check the Auto-registration Cisco Unified Communications Manager Group check box for a different Cisco Unified Communications Manager group, the previously chosen auto-registration group no longer serves as the default for the cluster; the Auto-registration Cisco Unified Communications Manager check box displays for the previously chosen group (the original default), and the check box gets disabled for the group that now serves as the default.
B
Disable Autoregistration
This section describes how to disable autoregistration.
Procedure
Step 1 Choose System > Cisco Unified CM.
Step 2 From the Cisco Unified Communications Manager list, choose the Cisco Unified Communications Manager where you want to disable autoregistration.
Step 3 To disable autoregistration for this Cisco Unified Communications Manager, click the Auto-registration Disabled on this Cisco Unified Communications Manager check box. (When this box is checked, autoregistration specifies disabled.)
Note
You can also disable autoregistration by setting the Starting Directory Number and Ending Directory Number to the same value.
Step 4 To save the changes in the database, click Save.
Step 5 Repeat Step 2 through Step 4 for each Cisco Unified Communications Manager where you want to disable autoregistration.
Related Information
Autoregistration Setup
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_0_1/ccmcfg/CUCM_BK_C95ABA82_00_admin-guide-100/CUCM_BK_C95ABA82_00_admin-guide-100_chapter_011010.html#CUCM_TK_D9AC83B2_00
Step 1 Choose System > Cisco Unified CM – this refers to CM not CM Groups. Note that to un-tick the auto reg on group you need another group to assign such roles to.
if you do it on CM you are delegating to Group resources (individual CM), but if yo do it on CM Group you are using a pool of CMs as configured on CM Group. That’s how i understand it.
So i agree with C as an answer given the Cluster has more than one Groups, cause if it is one group you can’t disable it.