I have setup a farm according to Medium Security Option on
Vlad Catrinescu's blog. I setup a backup of this farm using
Backup-SPFarm powershell script. If I grant read/write permissions to Everyone on shared folder everything works fine. But if I limit permissions only to SP_Admin account backup fails.
The solution is to grant the following accounts read/write permissions to shared folder:
- SP_Admin
- SP_Services
- SQL_Services
where SP_Admin is the user account which executes the script.