Exchange 2016 Troubleshooting: No server roles showing

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Scenario

A Mailbox server was running for a while at a customer, tried to add the server to a DAG but it just failed.

Troubleshooting

Decided to check a few things and on the Exchange Admin Center (EAC) I noticed it said no roles on the server in question. Launched the Exchange Management Shell and ran the following command:

  • Get-ExchangeServer -Identity <ServerName>

Below also showed that the server had no roles installed:

http://www.collaborationpro.com/wp-content/uploads/2018/12/ex2016recovery1.png

Very very strange indeed, launched the setup from an elevated prompt and installed the mailbox role again without an issue, after that the ServerRole info updated to Mailbox:

http://www.collaborationpro.com/wp-content/uploads/2018/12/ex2016recovery2.png