How to Install Exchange Server Updates on DAG Members

Exchange, Exchange Server SE / 2019 / 2016, High Availability, Migration & Upgrade
Applies to: Exchange Server SE / 2019 / 2016 / 2013 / 2010 Exchange Server updates on a Database Availability Group (DAG) should be installed one member at a time. The main goal is to move active databases away from the server, prevent them from activating back during maintenance, install the update, and then return the server to production. The original version of this article was written for Exchange 2010 SP1 and used the term Update Rollup. Current Exchange Server servicing uses Cumulative Updates (CU), Security Updates (SU), and when required Hotfix Updates (HU). The DAG maintenance principle is still the same. In This Article 1. Before You Start 2. Put the DAG Member in Maintenance Mode 3. Install the Exchange Update 4. Return the Server to Production 5. Update…
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Fix “No Site Name Is Available for This Machine” on Exchange Server

Fix “No Site Name Is Available for This Machine” on Exchange Server

Active Directory, Exchange, Exchange Server SE / 2019 / 2016, Identity
Applies to: Exchange Server SE / 2019 / 2016 / 2013 / 2010 | Active Directory Domain Services When the Microsoft Exchange POP3 service cannot determine the Active Directory site for the server, it can fail with the following error: No site name is available for this machine. This is Windows error ERROR_NO_SITENAME (1919 / 0x77F). In most cases, the Exchange server IP subnet is missing from Active Directory Sites and Services or is mapped to the wrong AD site. In This Article 1. Check the Detected AD Site 2. Verify the Subnet in Active Directory Sites and Services 3. Correct the Subnet-to-Site Mapping 4. Validate the Fix 5. About the SiteName Registry Value 6. Key Takeaways 1. Check the Detected AD Site Run nltest /dsgetsite on the Exchange server.…
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