Use the links manager (Window>Links). Click on the link, hit the Relink button at the bottom of the links window, navigate to the PDF, and either tick the Show Import Options checkbox, or hold the shift key (which is the same as checking the Show Import Options button) before hitting OK. In the Place PDF window, select the page of the PDF you want to update to, and the page you had will change to the page you want, including any cropping, scaling, etc.
Yeah, I know that way, I was asking if there was any easier way, other then reinserting it all over again.
That's a 4 step process, and having to do that for a 180 page document is rather burdensome.
...and having to do that for a 180 page document is rather burdensome.
I don't understand - 180 page PDF or InD? Why does the number of pages affect you swapping one page for the other? If you could describe in more detail your problem and what you're trying to achieve, we may be able to come up with another solution.
But for the question you asked, the solution above is the easiest.
I have a 180 page PDF I have already added to a 180 InDesign document. 3 pages were added to the beginning of the PDF, and now I must update every embedded page.
Not sure on your reasons for trying to attempt such a thing, but in any case...
So your 180 page PDF is now 183 pages? (after you added the 3 in at the start?) If I am understanding you correctly, you could add 3 pages into the InDD document then place the PDF into those 3 pages at the correct pages - presumably pages 181, 182 and 183.
Then, go to your links panel and select the PDF (make sure the dropdown arrow is pointing to the right). Re-link the PDF. It will update the PDF on every page it is placed.
How about adding the three new pages at the end, then moving them to the front (or just adding three new pages to the front)? Is there something else on those pages that needs to remain on that page number?
You might also want to think about re-importing the whole PDF int a new file. You can do that in a matter of minutes using the script here: InDesignSecrets » Blog Archive » Zanelli Releases MultiPageImporter for Importing both PDF and INDD Files