I did a little searching and found some relevant posts on this question.
The plural of CMS is CMSs. The possessive plural is CMSs’.
That’s my story and I’m sticking with it.
The plural of CMS
Published
I did a little searching and found some relevant posts on this question.
The plural of CMS is CMSs. The possessive plural is CMSs’.
That’s my story and I’m sticking with it.
Seek Nuance 
I hope you don’t mind, but I added this to my list of favorite IT quotes.
@BryanSD: I’m honored!