Which two changes should be made in the calendar when changes in daylight savings occur?

When changes in daylight savings occur, the timezone must be changed at both the user group level and the system partition level in order to adjust the start and end times of shifts. This can be done by logging into the Cisco Unified Contact Center Enterprise (UCCE) Administration Portal and navigating to the User Group Management and System Partition Management menus [1], respectively.

References: [1] https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/crs/express_10_6/user/guide/uccx_b_user-guide-cisco-unified-contact-center-express-106/uccx_b_user-guide-cisco-unified-contact-center-express-106_chapter_01210.html  [2] https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/crs/express_10_6

1. Cisco Collaboration System 12.x Solution Reference Network ...

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab12/collab12/contactc.html

C. Change the timezone at the user group level: The timezone for all the agents under the user group level should be changed to match the new time after daylight savings. This will ensure that the agents are working according to the new time zone and that their activity is recorded correctly in the system.

D. Change the timezone at the system partition level: The timezone at the system partition level should be changed to match the new time after daylight savings. This will ensure that the system is configured according to the new time zone and that all the activity is recorded in the correct time.