How to update user details for a remote resource

Hello,

I'm using Acronis True Image Echo Server and I keep receiving the following error:

"User name or password for the remote resource X:\Backup.tib is incorrect. Please check user name and password and type it again."

The X drive is a network share.

Now I believe I'm getting this error because we recently disabled an old user account.

I'm struggling to find instructions on how to enter a new 'username' and 'password' - could someone please point me in the right directions or let me know how to reset the username details?

Thank you,