Office 365 DirSync Setup Error 1603

During your journey of Office 365 nirvana, you may decide to install DirSync (or, as the setup window title more verbosely describes it, "Microsoft Online Services Directory Synchronization"). So, you spin up a new Windows Server 2008 R2 VM, join it to your domain, and, start the setup.

And then it happens.

ErrorCoexistence MSI installation failed. msiexec returned 1603 Unable to uninstall the Microsoft Online Services Directory Synchronization tool. Use the Control Panel to remove the Directory Synchronization tool.

What the heck?

Oh, you must have forgotten to install the .NET Framework 3.5.1 Features feature.  How silly of you.

You know what to do.

More MD3000i Trickery

Tonight I found myself recovering a VM on a Windows 2008 R2 cluster connected to an MD3000i SAN.  To make very long and painful story short, it appears that someone applied a series of Windows Updates and then a Dell DSM update that screwed up the multipathing.

In the end, I resorted to breaking the cluster and then mounting the LUNs.  Most of the VMs I kept on one server, but I wanted to move a handful to what used to be the other node of the cluster.  However, when reassigning the LUN in the MD Client to another host, I received an error that there was already a persistent reservation on the volume and that I should talk to my administrator.

In order to free the SCSI-3 reservation on the LUN, I had to run this command:

smcli -n -c "clear virtualDisk [\"virtualDiskName\"] reservations

After that, I was able to successfully re-assign the LUN.