Exchange Update Fails: ‘Cannot find Arbitration Mailbox’
KB ID 0001435 Problem Last night was a late one, Exchange 2016 update (CU9) failed to install and left the server in an unusable state. Relevant Part(s) of the Error —–Output Removed For the Sake of Brevity—– $name = “SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}”; —–Output Removed For the Sake of Brevity—– Write-ExchangeSetupLog -Info (“Cannot...