acronis true image server for windows version 8 - update credentials?

i am getting this error:

User name or password for remote resource \\Nasbackup\Acronis_Offsite\sql.word.com\sql.work_dc.tib is incorrect or selected device is inaccessible. Please re-type your user name and password, and check up, whether the selected device is connected.

i cannot seem to find the setting to update the backup location with the credentials.

can anyone assist?