How to edit a post which was written by a member who has cancelled his account

Editing someone else's post is impossible.  Refer to this thread:

http://support.lefora.com/2009/04/12/editing-other-users-posts/page1/

but that post was submittted by one our friends. We composed it together and now we need to do some editing
That's the post popular post. We can't afford to just delete it and do it all over again.

Unless the post was composed by a current admin then there's no way to edit it.

You mentioned it was a popular post, I'm not sure how many replies there are, but is it possible to copy and paste it into a reply on that thread, or start a new thread with the modified post and link to it from the original topic and lock the topic?

Is there any reason why admins can't edit someone's post

i don't understand that, it is so unusal practice

http://support.lefora.com/2008/10/08/frequently-asked-questions-w-answers/1312551/