To check the health of an active directory domain you can use the two tools dcdiag and repadmin or optionally the replication status tool here.
https://www.microsoft.com/en-us/download/details.aspx?id=30005
I'd try asking experts here about tools for SQL server and Exchange server.
https://learn.microsoft.com/en-us/answers/topics/58065/sql-server-general.html
https://learn.microsoft.com/en-us/answers/topics/46491/office-exchange-server-itpro.html
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