You can log in into the main SA web page, but when you click on the subcriber option, it prompts for username and password again. It does not accept the password you entered before.
This issue occurs when the account you use to log into CiscoUnity does not have required rights and permissions.
GrantUnityAccess is a command line tool that is used to allow an account to gain administrative access to the Unity SA console.
This program adds a user's NT or Domino Credentials to Cisco Unity's internal collection of recognized credentials and associates them with a local Cisco Unity subscriber for authentication with admin tools. The resulting permissions are based on the Cisco Unity subscriber's class of service.
If you are migrating users from NT4 using the Active Directory Migration Tool or any other user migration tool that supports SidHistory, use of this program is not necessary. Cisco Unity recognizes the SidHistory user attribute.
These are examples of how to use or apply this command on the dos prompt or command line: