Upgrading of Exchange Server 2013 CU from CU22 to CU23

HassanNasir 
If required, setup will perform it for you, unless you are in split-permissions mode. However, there are no https://docs.microsoft.com/en-us/exchange/exchange-2013-active-directory-schema-changes-exchange-2013-help#exchange-2013-cu23-active-directory-schema-changes.
There are some additional requirements for CU23.
See https://docs.microsoft.com/en-us/exchange/exchange-2013-prerequisites-exchange-2013-help?redirectedfrom=MSDN#mailbox-or-client-access-server-roles-1, note about .NET 4.7.2
Also see https://docs.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix?view=exchserver-2019#exchange-2013and https://docs.microsoft.com/en-us/exchange/exchange-2013-system-requirements-exchange-2013-help?redirectedfrom=MSDN#net-framework.