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You were asking the impact of migrating windows server 2016 to 2022 on your Active Directory. Also, you asked to know if there Is there any impact on Windows 7 clients and some applications use LDAP authentication.
The are many supported scenarios when upgrading domain controllers from Windows Server 2016 to Windows Server 2022. Also, the impact of migrating Windows Server 2016 to 2022 on Active Directory depends on the current version of Active Directory Domain Services (AD DS) functional level.
To more details about the impact of migrating, read more here:
- Active Directory Domain Services Functional Levels in Windows Server
- Active Directory Domain Services migration
If you can go through the above links, you will gain more insight on how to perform clean and successful migration.
Hope this is helpful, do not forget to accept it as an answer to help the community. Also, do not hesitate to ask more questions if there is a need.