Hello , 

There is a smart object In SharePoiint managment "Users" there is a method "Is User in Group" you can call this smo and check the user is availble in group or not.

THanks.

Hi tkunohim

I have created a small solution attached and some images of the rule set I used to validated if the user exsist in SharePoint or Not

Please note that this solution is in K2 5.1

If this was helpfull , please execpt this as a solution

Regards

Heinrich

HI Team,

On initialize form I am using sharepoint integration  helper smart object in which i am using is user in any one group method and in the input mapping i gave my site url,usergroupid in which i have a member and in user login id i am passing FQN value from systemvalues ---> current user ---> FQN but always get false in return .   how to check if current login user exist in that group or not.

Try using the Name reference under Current User instead of the FQN. That worked for me.