Sorry, what is an AD?
This is Microsoft Active Directory - Satish has AI jobs that are connecting to several ADs (i.e. LDAP directories) and I'm guessing pulling data for People attributes or similar. Might also be organisational data which AD can manage as well. Or it could be something even more complicated.
Seems the AI connector for AD is having authentication issues for just one of the AD domains it's trying to connect to.
I'm not an AI expert by any means so will leave that to the gurus, but this is at least what the question is all about.