Autodiscover.xml failed (0x80004005) and BPOS

A customer contacted to report a problem with Outlook’s AutoDiscover feature. The customer was a former BPOS customer that was testing some mailboxes deployed onto a new on-premises environment. The testExchangeConnectivity validation tool was reporting consistent results, so it appeared to be client related, but given the general complexity of the environment (domains, networks, VPNs,…

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A Sandwich You Should Avoid Ordering

Secure by default is a great response to the security problems that plagued Microsoft nearly a decade ago, but sometimes we, as consumers of a product, confuse the concepts of vulnerability and functionality. The receive connector is an example that I recently revisited, causing me enough confusion with a customer that I felt it might be…

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Event 1006 FailoverClustering: Cluster Service was halted due to incomplete connectivity with the other nodes

Ran into this event on an Exchange DAG where the customer was reporting that Exchange seemed to be making arbitrary decisions to randomly failover from Node1 to Node2 of the mailbox cluster. Some investigation showed that the 1006 event always corresponded to a 4082 MSExchangeRepl event in the application log and the events seemed to…

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