How can i add ADS group to my special identity

This doesn't work ootb as the sub-identity has to be present if you want to request the group membership for the sub-identity. You may create a custom approval step EX in the approval workflow for the group membership request that waits for the sub-identity to be created and then changes the recipient of the group membership request to the new sub-identity before approving the current step. But I haven't done that before to ensure that this is really working.

we were trying this but ,post approval the group was assigning to both main identity (may be thru oob functionality) and sub identity.(Through custom process what we invoked after the approval)

can we stop auto assignment of groups to main identity after the approval?

You haven't read my answer thoroughly. You would need to change UID_PersonOrdered of the request during the approval to the new sub-identity before you approve the request. And as another idea please check https://support.oneidentity.com/technical-documents/identity-manager/8.0/administration-guide-for-connecting-to-active-directory/34#TOPIC-851912 (Active Directory Group Inheritance Based on Categories)

Hi Markus,

After looking into above URL process ,
I have added a user account category called "SAI"  and group category called "SAI1"  under Domain/Active Directory

Then for one of the account and one of the group I have selected the corresponding category name's from change master data.
Now what will be my next step like what will happen in this case and can could you please explain a little bit what the above URL is processing for this example.

Hi Markus,

After looking into above URL process ,
I have added a user account category called "SAI"  and group category called "SAI1"  under Domain/Active Directory

Then for one of the account and one of the group I have selected the corresponding category name's from change master data.
Now what will be my next step like what will happen in this case and can could you please explain a little bit what the above URL is processing for this example.