Unable to on-board and off-board mailboxes in an Exchange HybridConfiguration

This blog post describes the situation where you are unable to move an Exchange Online (Office 365) mailbox to an on-premise Exchange 2010 server in a hybrid configuration.

If an Exchange Online mailbox is created via the Exchange 2010 Management Console, the ExchangeGUID of the MS Online Mailbox is not properly set in the remote-mailbox configuration of the Active Directory user object. In most cases this is no problem at all, but if you want to move an MS Online mailbox from the cloud to your on-premises Exchange 2010 server the process fails with the error "Exception has been thrown by the target of an invocation.".

Offloading mailboxes from Exchange Online to on-premise Exchange Server 2010

When a user mailbox is created in Exchange Online by the "Create Remote Mailbox" feature in Exchange Server 2010 and the mailbox of this user needs to be moved back to the on-premise Exchange 2010 environment, it will end up in the error "Exception has been thrown by the target of an invocation.

This was clearly a bug in Exchange Server 2010 SP2.

Creating a wildcard webserver certificate with your internal CA

It is possible to create a wildcard webserver certificate using your internal Enterprise CA based on Windows Server 2008 R2. To do this you need to have a Enterprice CA with the webserver template deployed.

The question you'll probably ask yourself is "Why do i need this?". Well the answer is simple. You probably don't want to use this certificate in a production environment, but you can use it for testing purposes without having you to buy a expensive commercial wildcard certificate. Espessially when the test results are having you deciding that a wildcard certificate is not the way to go.