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The most recent iterations of Exchange place significant emphasis on the use of Database Availability Groups (DAGs) to guarantee the robust availability of data. These DAGs have been meticulously crafted to safeguard Exchange Servers and their associated databases against server failures or potential database corruption, ensuring seamless and uninterrupted data access.
A Database Availability Group (DAG) can comprise multiple servers as its members, with the prerequisite that they all share the same version of Exchange Server. This ensures that no two different Exchange Server versions coexist within the same DAG. A DAG can accommodate up to 16 Exchange Servers, each capable of hosting multiple databases. The primary purpose of a Database Availability Group is to safeguard its member servers from potential catastrophes, enhancing overall system resilience.
When an Exchange Server is part of a Database Availability Group (DAG), it offers a robust solution for swift recovery in case of failure or data loss. This is achieved through the utilization of the “m:/RecoverServer” switch, which seamlessly accesses the server configuration stored within the Active Directory.
Upon successfully retrieving the server’s configuration settings, the switch initiates a seamless process to reload both files and services onto the server. Additionally, it seamlessly incorporates the roles and settings retrieved from the server into the Active Directory, ensuring a harmonious synchronization.
Prior to commencing the recovery process, it’s essential to familiarize ourselves with the concept of the Database Availability Group (DAG) and understand its role in safeguarding the database. When working with DAGs, which entails tasks such as addition, removal, or modification of settings, it is imperative to possess the requisite permissions. These permissions encompass the ability to add, remove, and configure settings for the database. Below, you’ll find a table outlining the specific permissions necessary for managing the Database Availability Group:
DAG Permissions |
|
Features | Permissions Required |
Database availability group membership | Organization Management
Database Availability Groups |
Database availability group properties | Organization Management
Database Availability Groups |
Database availability groups | Organization Management
Database Availability Groups |
Database availability networks | Organization Management
Database Availability Groups |
Before using the RecoverServer switch you need to perform various exchange commands using Exchange Management Shell:
The command will retrieve the truncation or replay log of the database copies.
The command will delete any database mailbox copy which is present on the server.
The command will delete the mailbox server files and settings from the respective availability group.
The command will add the Exchange server to the availability group.
After completing the process, you can start working on the Exchange Server and access the data in the database.
This concludes the comprehensive process for recovering a Database Availability Group (DAG) member Exchange server. It presents a straightforward and relatively uncomplicated approach to server recovery. However, it’s important to note that this method may not be as effective for severely compromised data, and data recovery cannot be guaranteed. For a more reliable solution, consider employing Kernel for Exchange Server, an Exchange Recovery tool. This robust software reads Exchange database files directly and can retrieve both corrupted and deleted data with confidence. Additionally, it eliminates the need for manual database location tracking, as it automatically searches for EDB files across various drives and folders.