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Exchange Server is vulnerable to corruption and other issues. Though the latest versions of Exchange are more stable and mature, one cannot guarantee that this platform is completely secure from issues. Some reasons for Exchange issues are discussed here:
Substandard hardware is a major reason Exchange issues. Bad sectors in hard drive where Exchange data is stored can cause database inaccessibility. Motherboard failure, overheating, and other issues can damage the hard drives; failure of drives holding the database or log files can cause Exchange issues. And not paying attention to event logs can make these events go unnoticed.
Exchange Server can fail due to various reasons such as OS stop error, communication issues, processor chip/mother board/backplane failure, etc. Exchange Server may experience downtime as a result of network issues, system overload, misconfiguration, and hardware issues too.
Boot failure can occur due to malware attacks or some other reasons like failure/non-response of system services and other applications. It can be caused by hardware malfunctioning and OS failures too.
Accidental and sudden shutdowns force Exchange information store to close down without writing transaction log files property, causing inconsistencies in the database files. Such shutdowns can occur due to sudden power failures or user errors.
Excessive growth of Exchange database can cause issues. When the database size limit of Exchange Server exceeds the limit mentioned in the registry, the Exchange store dismounts and alerts users about it by displaying an error. Exchange database may get corrupt and lost forever too.
Anti-virus programs, if not Exchange Server-aware, can cause Exchange issues if some directories, processes, and file names are not excluded from scanning. This issue is common with file level ant-virus scanners as such programs block Exchange databases or log files leading to database failure.
User errors are mainly administrator errors like stopping Microsoft Exchange Information Store Services, dismounting the wrong databases, deleting mailboxes or transaction log files, etc. Also, individual users may delete their mailbox items unknowingly. All these can make mailbox data inaccessible.
Exchange corruption issues can be severe or minor. But most of them can be settled by employing professional third-party Exchange recovery tools and EDB to PST Conversion Methods. It is also important to take steps to prevent them. Here is how you can do this:
If database corruption occurs in spite of all these precautions, you can try some Exchange Server Recovery tools to recover your lost mailboxes.