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We run an application via IIS, to save something as PDF using PDF-XChange printer driver.
It works fine in regular, but on one machine we have a problem: generating the pdf stops. We can not see a reason.
The applicationpool within IIS uses default identity "ApplicationPoolIdentity" which works fine on all other installations.
If we change the identity to "LocalService", it will work on the problematic machine as well . But due to other reasons, this is not a solution. It should run with "ApplicationPoolIdentity".
We tried to reinstall the Printer Driver several times. But it did not change anything.
Load User Profile is activated.
What else can we check, that "ApplicationPoolIdentity" can use the printer just as "LocalService".
Or what can we do, to locate the problem?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(6.4, 70%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EYD%3C/text%3E%3C/svg%3E)
Hi @Anonymous ,
Does your problem only occur on one specific machine? Are the other machines working fine? Is there any difference in the settings of IIS?
In the meantime there is more than one customer. As far as we see, the main settings seems to be the same.
The user profile that is used by the applicationpool has no printers at registry key
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Devices
at the problematic systems.
On the other hand, we made no special settings on systems, that work fine. And on that systems, there are the current printers at the registry key.
Hi @Anonymous ,
it looks like the ApplicationPoolIdentity does not have the right permission on the resource.
You can try to add the ApplicationPoolIdentity with the required permissions this way:
https://learn.microsoft.com/en-us/iis/manage/configuring-security/application-pool-identities#securing-resources
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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten