If you want to recover messages from Exchange database backup jobs, then verify that the MediaAgent has the required software.
The MediaAgent must have the following software:
The Exchange package (the package can be installed in restore-only mode)
Microsoft Outlook (64-bit) all versions for PST restores.
Microsoft Outlook (64-bit) 2019 version for restoring to a mailbox.
Visual C++ Redistributable for Visual Studio 2012 Update 4.
For more information, see the Microsoft article "Visual C++ Redistributable for Visual Studio 2012 Update 4", https://www.microsoft.com/en-us/download/details.aspx?id=30679.
Microsoft .NET Framework 4.6.2.