I created a new sandbox on an instance today for our company, but the log in is not working. The prod link for the sandbox (from setup) was
I used the same password to log into the sandbox as I successfully use to access prod (using just email@example.com). No luck.
I tried test.salesforce.com, according to https://help.salesforce.com/apex/HTViewSolution?id=000175987&language=en_US
Again, no luck.
Thanks to everyone for your thoughtful responses! I appreciate your help!
It turns out the client has an SSO configuration set up (relatively new), such that there is a custom URL that must be used to access the sandbox, and the standard URL (one given in the prod org linked to the "login") does not work.
So although I cannot log in from the prod list of sandboxes, using the custom URL convention does work.