Hi TejasK,

This does not directly answer your question but it seems fairly related. 

Have you looked at this article yet -> http://help.k2.com/KB001443

Thanks Alyssa, I am aware of K2 for sharepoint. I am currently using a trail version of K2 where I dont think its possible to configure k2 fro sharepoint from there.

Is there no other way to access and manupulate sharepoint online groups ?

Hi TejasK,

Sorry for the delayed response! 

I wanted to clarify if this refers to what you were trying to do before, which didn't work? Or this latter one?

Have you already tried to use a workflow to add/delete a user in a permission group? If so, how did you go about it? Have you tried using the following in your workflow:

Is this is K2 Designer for visual studio ?

I am using the K2 designer that comes with SmartForms. 

Lemme try this and get back to you.

Thanks.