I just checking our Unity server and I saw lot of this warning error message in our Unity server.
We have Unity 5.0 with CUCM 6.1
Event ID 1017
The Cisco Unity service that monitors Active Directory (AvDSAD) is skipping a synchronization cycle because it failed to connect to domain controller XXXX.ad.XXXX.com. Ensure that the server is accessible and is configured as a domain controller, and that no DNS issues exist. The service has failed to connect to this domain controller for 11 consecutive synchronization cycle(s). After 15 consecutive failed connection(s), The Cisco Unity service that monitors Active Directory (AvDSAD) will attempt to connect to a different domain controller.
Domain Controller: XXXX.ad.XXXX.com
Binding String: LDAP:// XXXX.ad.XXXX.com:389/ROOTDSE
Error Code: ERROR_DS_SERVER_DOWN
Description: The server is not operational.
Can someone let me know what should I do with this warning? We have not been using this Domain Controller: XXXX.ad.XXXX.com for long time. Or How to fix this issue?
I am not sure if the Windows team was making some changes that affect our unity server.