Critical Exchange Server recovery

Read how we resolved a critical IT crisis and restored a vital part of our client’s business. In this case study, we share how we worked around the clock to recover an Exchange Server from an unexpected system crash.

Microsoft
Azure AD Microsoft Entra ID

Sudden collapse of the Hyper-V environment

One of our clients experienced a serious system outage when the disks in their Hyper-V environment crashed. This disruption led to the Exchange farm disks, critical for the operation of the email system, becoming inaccessible. As a result, no user within the Exchange Server could send or receive emails. This crash created an immediate and urgent emergency situation, as email communication is a critical component of daily business operations

Immediate actions: To quickly address this critical situation and reduce downtime, we took the following steps immediately:

Priority migration: We immediately migrated critical mailboxes to Exchange Online to restore the email flow.

Delegated access: We ensured that specific, critical systems and users were granted necessary access to continue their essential functions.

Around-the-clock measures for Exchange Server recovery

In close collaboration with the client, we initiated a strategic and intensive rebuilding process.

  • Collaboration: We began by carefully analyzing the situation together with the client to understand exactly what needed to be addressed.
  • Rebuilding the IT infrastructure: With a detailed and methodical approach, we rebuilt the Exchange farm from the ground up, including the implementation of new servers.
  • Backup implementation: A critical step was to carefully select and utilize relevant backups for comprehensive recovery.
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Technical precision in the recovery process

In this process, we took the following steps to ensure data integrity and complete system functionality:

Database restoration and repair:

  • Data retrieval: We conducted a thorough retrieval of databases from the crashed disks, with a focus on data integrity and completeness.
  • Repair process: Each database underwent a detailed repair process to address any corruptions or inconsistencies that occurred due to the crash.
  • Remounting: The repaired databases were then remounted in the newly established environment, with continuous monitoring to ensure stable operation.

Recreation of hybrid environment:

  • Configuration optimization: We restored and optimized the hybrid configuration to guarantee efficient and seamless mail flow between Exchange Server and Microsoft 365.

Data export and import processes:

  • Automation of export: We utilized advanced PowerShell scripts to streamline the export of mailboxes from the damaged databases to PST files.
  • Third-party tools: To enhance speed and efficiency, we employed reliable third-party tools to facilitate the export process.

E-Discovery and integration:

  • Email extraction: Using eDiscovery technology, we extracted emails from Exchange Online and converted them into PST format.
  • Integration of restored mailboxes: These emails were then imported into the recently restored mailboxes, ensuring that no critical communication was lost during the recovery process.
 
 
 

Securing the future & providing continuous support

After successfully completing the recovery, the continued focus was on the following areas to ensure stability and future efficiency:

  1. Strategic node restoration: We planned the rebuilding of one of the Exchange nodes, which was currently on the wrong storage, and it was to be replaced with a newly installed node with the same name.

  2. Migration planning: We prepared for the migration of active databases to another node before shutting down the current node.

  3. Exchange upgrade plan: We initiated the planning for a comprehensive upgrade from the current Exchange 2016 environment to Exchange 2019, including new servers and databases for a robust and modern infrastructure.

Exchange server restore

Expert solutions for critical IT-challenges

Our IT consultants’ expertise allows us to swiftly and effectively handle critical IT situations, restore vital systems, and ensure business continuity.

Contact us today to discover how we can support your organization in its IT challenges and digital ambitions.