F5 DNS Express

Hello.

1. Could you first check your DNS Express settings?

DNS ›› Delivery : Nameservers : Nameserver List

The AD server IP address should be registered as the nameserver here.

(TSIG and other settings must be identical to AD.)

Then, in

DNS ›› Zones : Zones : Zone List

register the zone you want to delegate to DNS Express.

At this point, register the nameserver as the AD nameserver you created above.

(Similarly, decide whether to use TSIG and configure the settings accordingly.)

You said you're not sending a transfer request when you receive an alarm.

Can you try adding the AD server IP address to Allow NOTIFY From?

2. Are all domains registered in the zone and receiving them in the transfer format?

Or are they registered in WideIP and are they fixed?

Why aren't you receiving a response? Timeout? No error? (WideIP settings take precedence over zone settings.)

If we could view actual DNS requests and responses using tcpdump, we could conduct a more detailed analysis.

I hope this helps.