What are the system requirements of ORF?Article was last updated on January 31, 2017. View products that this article applies to.
The minimum system requirements for ORF servers are the following:
Microsoft® Windows® Server 2012 R2
Microsoft® Windows® Server 2012
Microsoft® Windows® Server 2008 R2
Microsoft® Windows® Server 2008
Microsoft® Windows® 2003 Server SP1
Windows® Small Business Server 2011 Standard) 
Windows® Small Business Server 2008 (latest Service Pack required) 
Windows® Small Business Server 2003 R2 (latest Service Pack required) 
Windows® Small Business Server 2003 (latest Service Pack required) 
Microsoft® Exchange 2016
Microsoft® Exchange 2013 (see  for Service Pack 1 compatibility)
Microsoft® Exchange 2010
Microsoft® Exchange 2007 (64-bit release version only )
Microsoft® Exchange 2003
Microsoft® Exchange 2000
Microsoft® IIS SMTP Service 6
Microsoft® IIS SMTP Service 5
|Platform||Both 32-bit and 64-bit  OS platforms are supported|
|Internet Explorer®||Microsoft® Internet Explorer® 6 or later|
|CPU||As required by the operating system|
|Storage||Varies, at least 100Mb|
|RAM||Varies, at least 50Mb|
 ORF Fusion for SBS will run on Small Business Server only. ORF Fusion will run on both SBS and the regular Windows® Server platforms.
 Microsoft has released a 32-bit version of Exchange 2007 for lab testing only. ORF is not compatible with this version.
 Compatibility with Exchange 2013 Service Pack 1 requires installing a bugfix from Microsoft. Learn more about this.
The recommended system configuration is that of Microsoft® Exchange. In overall, introducing ORF to a system that is already capable of running Exchange or IIS SMTP smoothly does not add significant further load to the system. However, estimating the load generated by ORF is very difficult, because it depends much on the features and configuration used.
ORF requires considerable disk space for logs, about 500 bytes per log entry on average. This results in the following average disk space requirements:
|Email Traffic||Logs for 1 day||Logs for 30 days|
|1,000 / day||488 kB||14 Mb|
|10,000 / day||4.5 Mb||143 Mb|
|50,000 / day||24 Mb||715 Mb|
|100,000 / day||48 Mb||1.4 Gb|
|500,000 / day||238 Mb||7 Gb|
Log retention can be configured in ORF (defaults to 30 days).
The article above applies to the following products and versions:
- ORF 5.4.1