Re: Eol for SMBR, how to script it?

Have a look at the kb below, may be related to your issue.

Unable to mount Exchange databases on DR environment as the "Drives" mounted from an Exchange Backup have the following attributes set by default: No Default Drive Letter, Shadow Copy, Read-only, Hidden

https://kb.netapp.com/Advice_and_Troubleshooting/Data_Protection_and_Security/SnapCenter/Unable_to_Access_Exchange_Database_on_DR_Environment_after_Mounting_Disks_Manually