Ad dns recovery

The customer has two DC servers. DC1 is DC and DNS, DC2 is DC, and DNS is not installed. The DC1 blue screen is corrupted. You have moved FSMO to DC2, installed DNS, and integrated it into AD.
However, it is found that there are only A few A records in the DNS records on DC2, and there are no other records, such as _ msdcs and _ tcp.
An attempt is made to disable net logon, delete the dns region, create a new region, and enable net logon to restore the region. In the current DC2, we can see that the user does not have any backup. How can I recover DNS and AD.
A: we do not need to back up the AD database manually. Because the AD database is automatically synchronized between DC1 and DC2. Although DC1 is broken, we can still maintain the AD database through DC2.
For DNS problems, because there is no DNS database backup, we cannot solve the DNS problem through Backup recovery. However, we can manually re-create the _ msdcs. domain AD integration region and other regions on DC2, so that DC2 can replace DC1 for DNS resolution.

I have tested this problem on my VM. The test result is a successfully created _ msdcs. domain AD integration area.
However, after creating the _ msdcs. domain AD integration area, run the following command to register the SRV record:
Dnscmd/clearcache & ipconfig/flushdns & net stop netlogon & net stop dns & net start netolgon & ipconfig/registerdns
Yes, they all need to be created through the new method. However, the _ msdcs. domain AD integration area is quite special. The following describes how to create the _ msdcs. domain AD integration zone:
Open the dns mmc, right-click "Forward Lookup Zones", and select "New Zone ". Create the following regions:
Type Selection: main area of AD integration.
Ø replication type: "To all DNS servers running on domain controllers in this domain :"
Ø region name: _ msdcs. domain (note that the domain name is the actual domain name, such as contoso.com ).
After the _ msdcs. domain AD integration area is created, run the following command to register the SRV record:
Dnscmd/clearcache & ipconfig/flushdns & net stop netlogon & net stop dns & net start netolgon & ipconfig/registerdns
Xiongfei Wu
For more information about ad dns recovery, see
Ad dns recovery
Dns server Reconstruction and Recovery
Windows 2003AD domain DNS Restoration
--- Gnaw0725
Author "activity directory SEO"