So I just transfered website.de to de.website.com (301 page by page) and added new site on Google and Bing webmaster tools, together with new sitemaps.
I was wondering if there is anything else I should do to ensure this process runs smoothly and without any problems? Afaik, you can't use Change of Address tool for subdomains on Google and Bing, so I was wondering if there is anything else I should do at this point ?
Some people will contact the websites still linking to the old site and try to get them to update the links to the new site since a 301 redirect does evaporate a tiny bit of link power. Others think that this can be trouble.