A dynamic link library DLL (MSExchangePS64.dll) initialization routine failed

OS

Windows 2012 / Exchange 2013

Software

6.13.0.0 and later

Error message

A dynamic link library DLL (MSExchangePS64.dll or MSExchangePS32.dll)) initialization routine failed (MS Exchange 2013 Server Backup)

Cause

This issue can occurs if the .NET Framework 3.5 Features is not installed on the affected Windows 2012 Server.
For server backup of Exchange 2013, the .NET Framework 3.5 Windows features must be installed.

Solution

To resolve the issue, please install the .NET Framework 3.5 Features on the corresponding Windows 2012 Server: