Adding scrolling=”yes” in the iframe style may work. I also had the same issue and it worked for me.
<iframe style=”height: 2500px; width: 100%; border: none;” src=”link to page” scrolling="yes" frameborder=”0″><span data-mce-type=”bookmark” style=”display: inline-block; position:absolute; width: 0px; overflow: hidden; line-height: 0;” class=”mce_SELRES_start”></span></iframe> You can also use an iframe generator tool to add options such as border, scrollbar etc. to your iframe.
I hope this helps!
