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IIS_IUSRS doesn't exist to be added on Synology share

iq flag

I used to have my website running on a physical Windows Server 2016 machine with IIS 10 which accessed its data files on an old Netgear NAS. I have since replaced the NAS with a Synology RS815+ running DSM 6.2.4-25556 Update 6 and virtualized the web server, with the intention of also running the website off of a NAS share. Just as what automatically happens with inetpub\wwwroot, I need to enable read permissions on the website folder as well as the data files to be served for IIS_IUSRS. The Synology is joined to my domain.

When I access any specific NAS folder's Properties/Security, click Edit and Add, enter "IIS" and click Check Names, I get the Name Not Found box. I've checked everything I can think of. Is there a DSM setting I'm missing? Or is this truly a Windows issue? Currently, the website is up on C:, but that's not ideal on my VM, and it can't access its data files to be useful. Can anybody help get my site up again?

joeqwerty avatar
cv flag
Does the user or group in question exist in AD?
Lex Li avatar
vn flag
`<Machine name>/IIS_IUSRS` is a local group, so it is impossible to configure it across machine boundary. Configure the application pool to use a domain service account, and then on NAS side you can grant that account the right permissions. Note that mapping IIS sites to a file share in general not a good idea. Files should be hosted on the IIS machine for best performance.
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