The website I'm working on can have both upper and lower case URLs, even though they will produce the exact same content.  eg: http://www.freeofficefinder.com/uk/office-space/london/soho and http://www.freeofficefinder.com/uk/office-space/london/SOHO Will both produce the same search results for the area Soho.I have just placed a Lower Case canonical url in the all the pages now seeing as Google was obviously complaining about duplicate results.  After almost 4 weeks these pages are still listed as being duplicate even though the Canonical URL is lower case (even for the uppercase links)Is there something else I should do, will this canonical URL work, or should I just wait a little longer for Google to update my index in Google Webmaster Tools?
Will lower casing all canonical url solve duplicate issue
seo;google search console;duplicate content;canonical url;case sensitive
I had the exact same situation ( a webshop), just wait. I also 301 all the uppercased paged to the lowercase version, that might speed things up.Make sure you canonical all pages  Header 301 all pages to the lowercase  Make sure your sitemap is up to date  Make sure all inpage anchors are correct