DNS Records Not Updating

I’m going to stray off of the beaten path and post a blog regarding an Active Directory DNS issue that I experienced.  Although it’s not Exchange server related, I thought this would be worth publishing as I’m sure others have encountered this issue.

We noticed that client DNS records were not getting updated in a timely manner.  More specifically, this was occurring primarily with clients that were connecting remotely to the internal network via VPN.

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Exchange 2010 DAG Unavailable

I had a situation where my test environment DAG was offline and not detected.  I’m not sure what caused this issue, however the mailbox databases were dismounted and the Content Indexes were in a failed state.  This environment has two sites with a single DAG expanding across the sites.  One site is active with a single Mailbox server and one CAS/HUB multi-role server.  The passive site has the same configuration.

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