Each time I try to sign in to Document Cloud Adobe, I get an error message saying "unexpected error encountered". What servers does this work with? I have Google Chrome and Mozilla Fox but neither seems to work.
I don't understand the question "What servers" - unless you actually mean "what web browsers...?"
There seems to be some trouble connecting with Document Cloud server. This issue hasn't been reported by other user by now.
1- If possible, you may change the Internet network to a different one and try connecting with Document Cloud website. https://documentcloud.adobe.com/
2- Disable Internet security software if there's any.
Note: Changing the above security settings could pose security risks. We suggest you to turn it back On once you are done with testing.