My company has Sharepoint 2003 and want to use Nintex for workflow. Is it possible?
Hmm, sorry friend, it looks like probably not.. here are Nintex's system requirements. Check out page 2 of this document:
Nintex System Requirements
Now is a great time to get on the SharePoint Online bandwagon, though, and Nintex and O365 work well together...!
Nintex started providing Workflows for SharePoint 2007. I'm not even sure SharePoint 2003 had a workflow engine at all.
You should consider an upgrade installation of your SharePoint-Server, not only because the new functionality of the later SharePoint-Releases but more because Support and Security reasons.
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