We navigate to https://crm.xxxxxx.com.au/ , which goes to https://adfs.xxxxx.com.au/adfs/ls/?wa=wsignin1.0&wtrealm=https%3a%2f%2fcrm.pa.com.au%2f&wctx=rm%3d1%26id%3d938e96b4-4616-4a9b-aeba-ceeb7095108b%26ru%

Which goes to 404 https://adfs.xxxxx.com.au/

We changed the below from authpaadfs.xxxx.com.au to https://crm.xxxxxx.com.au/ which fixed it