I have a multisite single forest / domain, We have majority of our servers in London and all subnets in use in London are applied to the London AD site.
We have a few branch offices and the subnets in use in each are correctly applied to the respective AD site.
Issue i have is a couple of App servers at our London HQ use LDAP to authenticate people e.g one problem app is our Jira support desk system, we are getting intermittent logon issues where users are not authenticated, a few mins later it works.
I have checked the event logs and done a dcdiag on the DC's and also checked all of the time sync between DC's and the meber servers involved and everything is good.
One thing i have noticed is if from our Jira server (which is on a subnet linked to the London AD site) if i ping just our domain name mydomain.local I actually get the IP address back of a DC in Singapore. the DNS servers that the Jira server has configured are 2 domain controllers in the London site
Any ideas why this icould be happening if my AD sites are configured correctly