There are over 40k pages of duplicate content that was flagged during an audit. It seems that most are due to the parameters in the URLs. The format is below:
http://example.org/site/UserLogin
http://example.org/site/UserLogin?NEXTURL=http://www.domain.org/folder1/page1
http://example.org/site/UserLogin?NEXTURL=http://www.domain.org/folder2/page2
http://example.org/site/UserLogin?NEXTURL=http://www.domain.org/folder3/page3
Would adding the parameter in Search Console fix those issues?
rel="canonical"
is not an option due to the CMS the client is using.