Hello HomerSibayan-2720,
Thank you for posting here.
Here are the answers for your references.
From the issue you provided, I want to confirm the following questions:
Q: File Server is not accessible with or using IP address itself and it is accessible only using FQDN / computer name.
1. If we access file server with or using IP address, what error message do you receive?
2. Please check the preferred DNS of this file server.
If you can provide us with a screenshot of the inspection process and the error report, we would be very grateful and we can better troubleshoot the problem for you.
Q: Workstation computer don't have any ip address received if AD 2008 is shutdown.
We can run ipconfig /renew to see if the new DHCP server can assign IP addresses for workstation computers, if no, maybe the DHCP server is not migrated successfully from old 2008 R2 to 2016.
For migrating DHCP or reconfigure DHCP on this new 2016 DC, we can check if we have migrated DHCP server successfully based on the following two links.
How to Migrate DHCP from Windows Server 2008 to 2012/2016
https://brycematheson.io/how-to-migrate-dhcp-from-windows-server-2008-to-2012-2016/
How to Migrate DHCP from Windows Server 2012 R2 to Server 2016
https://www.faqforge.com/windows-server-2016/migrate-dhcp-windows-server-2012-r2-server-2016/
Meanwhile, in order to better troubleshoot the problem, please confirm the following information:
- Is there only one domain (single forest, single domain)?
- There is only this 2008 (2008 R2) DC before adding 2016 DC in this domain?
- What are the forest functional level and domain functional level?
- Check if AD environment is healthy. Check whether all DCs in this domain is working fine by running Dcdiag /v on both DCs.
- Check fsmo by running netdom query fsmo on any one DC.
- Check if AD replication works properly by running repadmin /showrepl and repadmin /replsum on both DCs.
- Please running gpupdate /force on both DCs check GPO update status..
If anything is unclear, please feel free to let us know.
Best Regards,
Stephanie Yu