I am desperate and hope someone can help me.

To restrict access to websites in Edge, the following GPO for whitelist URLs GPO: is configured.

Via an internal web portal users can add network printers.

The intranet page is

druckerauswahl.rhvb.verwalt-berlin.de.

Using Wireshark, I located the following three URLs and stored them in the GPO:

• Iprint.rhvb.verwalt-berlin.de
• Oes4.rhvb.verwalt-berlin.de
• Printer selection.rhvb.verwalt-berlin.de**

These are the settings which in configured inside the gpo:

list of allowed URLs:

ipp://iprint.rhvb.verwalt-berlin.de
rhvb.verwalt-berlin.de
iprint:/a


here is also a screenshot of the configuration

The web portal opens correctly


However, when I try to add a printer I get the following error:


when i hover over the link to add a printer i can see the following url in the browser:



iprint:/a%20%22ipp://iprint.rhvb.verwalt-berlin.de/ipp/DR0161-SamsungCLP670nd%22

Unfortunately I have no idea which URL I have to share for this and I can't see anything in WireShark. I hope someone has an idea.

i tried to encode the string and get the following

iprint:/a "ipp://iprint.rhvb.verwalt-berlin.de/ipp/DR0161-SamsungCLP670nd"

but even if i whitelist this url i get the same error page

If I whitelist all URL in the GPO using (*) then the printer can be added but then also internet access is possible which should be restricted.

I allready tried to identify all urls while a user try to add a printer over the web portal