I presume you mean the snapmirror destination. You can force the volume online, but will then encounter issues with resuming SM. It becomes more difficult if you are running an SVM-DR.
The way I do it,is:
I have a Recovery SVM on the Backup array setup for access by admins with a CIFS and NFS server setup.
I then clone the snapmirrored volume using a snapshot I am interested in recovering from, to the Recovery SVM. Export or share as usual, copy back your data, and then;
Delete the clone, or else it will cause you snapshot rotation to fail on the destination.
There was a third party software tool that allowed you to recovery via a File Explorer type interface, but has not progressed to FlexGroups which we are very heavily invested in. It is also an extra cost item.
Hope this helps
TasP