Because there are many answers that do not help or recommend contacting TAС or are completely uninformative. After trying everything and spending a lot of time, I posted what really helped me, so that someone else who faces this problem does not wast...

admin: utils ungraceful warn disableBefore you disable the warning message, make sure that the ungraceful shutdown does not have any adverse affect on the server.This command will ensure that the ungraceful shutdown warning is not shown in Unified CM...