Display of Filesserver in Ressource and permission view lost

Hi there,

I have a very strange issue

We have an ARM Role 'Helpdesk' which have been able to change permissions on our fileshares with ARM, but now the Fileserver can't be seen in the 'Ressource' and 'Permission' view for all 'Helpdesk' colleagues. Now they only see our AD and Exchange. I don't know what changed? In the Role Definition there is everything they need enabled (so nothing was changed on this side). Have you ever experienced an issue like this? 

I really don't know where to look else

Happy for any reply!