FAQs: NXPowerLite for Microsoft Exchange

Reclaiming Space

How does it work?
Email attachments are often much larger than they need to be. NXPowerLite makes them smaller by removing any excess baggage and converting graphics to the most appropriate file format and resolution. Optimized attachments remain in their original format, and will be visually and functionally the same as the original. They don't need to be decompressed or re-hydrated, and there's no need for special viewing software - so they can be opened and edited by anybody.
NXPowerLite works by replacing original documents and image attachments with smaller versions in each user's email account which will reclaim space. It has two integral parts: A Windows service in the background to process the files and a Dashboard to configure the connection to the Exchange server and select files and compression settings. For more detailed information see How it works.
Can I compress emails in hosted Exchange or Office 365 installations?
NXPowerLite needs to have access to the Active Domain and also Exchange Web Services URL in order to grab a list of users and manipulate email account content (read more here). In most hosted Exchange and Office 365 environments this is not possible and therefore it will not work.
How fast does NXPowerLite process data?
On average, NXPowerLite will process around 1TB of data in a 24-hour period. Other factors such as Disk I/O speed on the installed device and network speed to the Exchange installation will also affect the speed of processing
Will NXPowerLite reclaim the disk space freed up during processing?
By replacing original attachments with smaller versions NXPowerLite will free up space in the Exchange database. However, this space will not be reclaimed on disk until the database has been compacted. This usually happens as part of regular maintenance or defrag.
Does NXPowerLite for Microsoft Exchange modify any Exchange metadata?

Yes, when NXPowerLite optimizes file attachments in Exchange items, it changes some properties of the items in question.

To make changes to Exchange, NXPowerLite uses the Microsoft EWS API. All property changes made during the course of optimization result from our using this API; NXPowerLite does not directly alter Exchange data.

Tagging of Exchange items by NXPowerLite

NXPowerLite adds its own item tag to the properties of each item that has at least one attachment successfully optimized. This allows NXPowerLite to potentially skip that item on future optimization runs, resulting in improved performance.

Other properties changed as the result of optimization

During the course of development, we have identified other Exchange item properties that are modified as a result of running NXPowerLite. This list may not be exhaustive, but includes:



What are the system requirements for NXPowerLite

Installation requirements

  • Any Windows OS from XP/2003 onwards with latest service pack.
  • .NET Framework 3.5, 4.0 or 4.5 installed.
  • The connected Microsoft Exchange Client Access server will need to have a trusted SSL certificate, or if it has a self-signed certificate , the certificate will need to be installed on the computer running NXPowerLite. See our support article "Troubleshooting NXPowerLite for Microsoft Exchange SSL certificate problems" for further information.

It does not have to be installed on the same device which runs the local Microsoft Exchange instance.

Exchange Server Connection

It does not have to be installed on the same device which runs the local Microsoft Exchange instance.

How does NXPowerLite interact with background scanning software e.g Anti-virus or Backup scanners?

By its nature, NXPowerLite will change a lot of files, especially in its initial pass-through of the data. This means that it will start a lot of activity with any active scanning software such as anti-virus or backup. This will improve over time as the number of changes to files reduces.

How is NXPowerLite compression different to Deduplication or Compression?
NXPowerLite does not remove duplicate files or compress files. It works on pre-compressed files like user documents and images that typically don't respond as well to deduplication or compression. It looks for 'waste' within those files, which it strips out completely. This leaves you with smaller source files, which should then amplify the effect of your deduplication. For more detailed information read Read more...



How do I limit the number of user accounts NXPowerLite processes?
By default and once configured, NXPowerLite will process all user accounts that it finds. If you would like to restrict the processing to certain groups of users then it is possible to change impersonation rules for the EWS


File Processing

What happens to the last modified/accessed dates of files when they are processed?
NXPowerLite works hard to ensure that files look like they remain untouched. After processing, files will have the same Last access and last modified date, along with all the metadata that the original file contained.
What file formats does NXPowerLite work with?
NXPowerLite can optimize the following types of files with the following extensions:

Microsoft PowerPoint 97-2003 binary format (.ppt, .pot, .pps)
Microsoft PowerPoint 2007-2016 Open XML format (.pptx, .pptm, .potx, .potm, .ppsx, .ppsm)
Microsoft Word 97-2003 binary format (.doc, .dot)
Microsoft Word 2007 - 2016 Open XML format (.docx, .docm, .dotx, .dotm)
Microsoft Excel 97-2003 binary format (.xls, .xlt)
Microsoft Excel 2007-2016 Open XML format (.xlsx, .xlsm, .xltx, .xltm)
PDF documents (.pdf)
JPEG images (.jpeg, .jpg, .jpe, .jfif, .jif, .jfi)
TIFF files (.tiff, .tif)
What happens to files that have been through an OCR process?
NXPowerLite should work seamlessly with files that have been through an OCR process. NXPowerLite does not change any of the font data so there is little chance of it interfering with OCR process.
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