Script from Michael Van Hybrid ! The best of the best !
Technet gallery deprecated, Michael if you read this, please reach out to me so I can put the proper credits for these scripts
After maintenance, it's always a good idea to check that all Exchange components are Active (no "Inactive", no "Draining" state
https://blogs.technet.microsoft.com/samdrey/2018/10/29/exchange-server-components-checker/