Microsoft has released a patch to resolve issues with Exchange Server 2013 that affected its backup and recovery functionalities.

The latest update includes fixes for issues reported by customers, small product improvements and previously released security notices.

Microsoft Exchange Team said in a statement that the fix in Exchange Server 2013 Cumulative Update 3 impacts customers who rely upon Backup and Recovery mechanisms to protect Exchange data.

"Cumulative Update 3 includes a fix for an issue which may randomly prevent a backup dataset taken from Exchange Server 2013 from restoring correctly," the team said.

"Customers who rely on Backup and Recovery in their day-to-day operations are encouraged to deploy Cumulative Update 3 and initiate backups of their data to ensure that data contained in backups may be restored correctly.

Users of Exchange’s Backup and Recovery functionality are advised to use Cumulative Update 3 and start backups of their data to make sure that data within backups can be restored correctly.

The latest patch also fixes three key vulnerabilities that may let hacklers to access an affected Exchange server.

Microsoft is planning to launch Exchange Server 2013 Cumulative Update 4 as Exchange Server 2013 Service Pack 1.

As part of the fix, the software major also improved Exchange admin console and the audit log, while also eliminated the need that Windows 8.1/IE11’s use of OWA Light.