不只單單看 Log, 微軟官方有 AD 維運白皮書可以參考:
AD DS Operations

上面的文件中指出, 日常維運項目需要了解的知識包含:

• AD Forest Recvery Guide
• Best Practices for Securing AD
• AD Replication and Topology
• Management Using Windows Powershell
• Managing RID issues
• AD DS Component updates
• Understand AD account
• Understand AD Seucirty groups
• Understand Service accounts
• Understand Microsoft accounts
• Understand Security Principals
• Understand Security accounts
• How to configure protected acccount
• How LDAP server cookies are handled

你去看 log 內容之前, 若沒有具備上面這些知識, 連 log 在講甚麼都看不懂...

單純就 log 種類來說, 以下這些 Event ID 都應該被監視, 並解決其問題, 可以先練習看看, 能看得懂幾個? 並且有能力解決幾個? (Potential Criticality=High 的要立即解掉, medium 的一周內要能解掉, low 的 30 天內解掉)
Events to Monitor