When trying to create a scheduled backup password that contains certain special characters, the following error is thrown:
Equal (=) symbol is not an allowed character for the scheduled backup password.
Release : 2018.1
Component : AGILE CENTRAL ON PREMISES
When you update the password, the appliance is performing a sed command to update a config file. It may have been thought that including an escaped = character might be seen as part of the regular expression and therefore a decision was made to not allow those characters. Other passwords that are stored in the database would not be subject to being passed through a regular expression.
Since the = sign is a restricted character, you must choose a password that does not contain an = sign.