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If both the www. and non-www. URLs were being indexed - creating duplicates for nearly every page on your website - then the significant drop in number of pages indexed makes sense.

Hello Becky, Yes it could be interpreted as their gaining links and your not. But it could also be interpreted as the sites their backlinks are on are gaining links, and the sites your backlinks are on are losing links. If your backlink is on my site and my site's DA goes up by 30 points, then your site's DA will also go up by a certain number of points. Your DA increase would be dependent on where your backlink is on my site. If your backlink was on my homepage, then I'd say your DA would probably go up by about 4 points. And yes Becky, the only way to increase DA is via inbound links. But I would also try to move my clients focus away from this metric as it's not that relevant to traffic or rankings. In many niches, I see sites with lower DA dominating the rankings and getting more traffic.

What environment is the site built in? Normally, you build the microdata markup into the site template, this way no hard-coding of individual microdata is needed. If you're on WordPress, there are plugins for that.

Hello Becky, Abe here at Moz. Matt could be right about changes to the website causing the sudden dip. I have seen a drop like that take place several times when some minor changes have been made. Sometimes when pages are temporarily hidden from our crawler, we would fail to report any errors during that crawl. If you are seeing a discrepancy or something seems totally off, never hesitate to contact us at help@moz.com. We can always dig in and get our engineers involved to ensure it wouldn't be a bug or error on our part.

Here you go: http://www.mcanerin.com/en/articles/301-redirect-iis.asp Enjoy!

Hi Becky, has your issue been resolved?