Do you have Nintex Forms for O365 installed?

Nintex Workflow does NOT offer any possibilities to modify forms.

Yes. We do have it installed and I have already mentioned this in the question.

No, you haven't.

Don't get me wrong but are you sure you have understood that Nintex Forms and Nintex Workflow are two seperate apps to install?

Ok. Now you know… Can you please suggest me some solution?

Thanks

Heeral

You have to add a separate app to a site where you want to edit your forms. The app is called Nintex Forms for Office 365. Go to "Site Contents" and click "add an app", type "forms" and click to add:

After the app is provisioned to the site, the button becomes active

If you have a license for Nintex Workflow for O365 then Forms are as well included.

Regards,

Tomasz

I have been told that Nintex Forms is already installed

kind of...

‌: 

Could you please attach some screenshots of the greyed out item where you are looking to modify? 

We will need more details than we currently have, and a screenshot is a good place to start. 

Although you have now indicated to ‌ that you have added the O365 Nintex Forms App to your site, that would be the number one reason why this is happening... so we need more in order to help you.

Rhia