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I have a client who has 750 agents. They want to provide them all with a website on a subdomain (mysite.domain.com). The sites will all contain basically the same info, however, this info can be customized on each site by each rep. Most of these reps sell pretty much the same thing, so the customization wont be very dramatic.

So the question is, how can we build this replicated website system and deliver SEO value to each site?

Thanks so much for the response. Just to be sure I understand, for the mypersonalsite.com redirecting to the template site, there is a mask involved, so you never actually see the templated site's URLs.

So instead of mypersonalsite.com redirecting to templatedsite.bigsite.com, it shows mypersonalsite.com once redirected and instead of showing templatedsite.bigsite.com/page1 it shows mypersonalsite.com/page1

So does defining the canonical still work in this case? And it would need to be defined on all the templated sites URL's correct? We can access each page on the templated site, however, I'm not sure we can access the head section though, just page content.

My question has 2 parts: 1) Can you optimize a subdomain template site (a company is providing us with a template site they provide many other salespeople, but we can control the meta and content on each page), and 2) Does forwarding and masking another domain to the subdomain in question, hurt my SEO efforts?