We are facing an issue, that we have to use a specific password, which the customer define and we have to use for protecting the documents. It's not allowed, to use a different password.

This password is longer than 20 characters, but you have rules for the password and one of it is defined, that the password has not to be longer than 20 characters.
That means for us, we cannot share any Adobe files with these customer, which means, that we have to use competitor tools, which allows a password with more than 20 characters...
Would be great, when you can extend the max. character amount to 32 or even more.