Scenario: After Exchange Patching/Upgrades (both failed and successful attempts) you may notice that the Server Component States become Inactive. For Example, even though the IMAP service is started, the server may be refusing the connection. To check to see the Server Component States state, run the following command:
get-servercomponentstate <servername>
To re-activate a Server Component State, run the following
set-servercomponentstate <servername> -component <component name> -State Active -Requester HealthAPI.
Note, other Requester’s you could try are:
Maintenance, Sidelined, Functional, Deployment
Ex-Shell 