I'm relatively new to SEO. I've inherited a company website which was, in my opinion, poorly managed for several years.
One problem is that the company management and IT department would domain squat on several names (over a dozen) which were variants on their original domain name. This has caused confusion in our user base as the current domain which draws the most traffic is not the same as the company's original email domain. This has also caused confusion with AdWords which has in the past banned the site for what I think was a "duplicate content" violation.
How to straighten this mess out is the question. One policy I'm insisting on is using only one domain name in current and future marketing materials. What do I do with the "legacy" domains which are still drawing traffic?