Hi,
You can display a custom aspx page in Dynamics CRM online.
To achieve this, you can add an iframe to the form in CRM and specify the url of custom aspx page in the source url shown in below screenshot:

Note: For this you need to have that custom aspx page hosted on the internet.
If the custom aspx page is hosted over unsecured site i.e. if the aspx page url is over http then in order to display it you will need to allow all content in browser .
Hope this helps.
Thanks!
Sam
Inogic |
Blog | news@inogic.com
If this post answers your question, please click "Mark As Answer" on the post and "Mark as Helpful"