<p>After installing the cumulative update (KB5005573) on the print server many of our customers reported printing issues.</p>
<p><img class="alignnone size-full wp-image-4371" src="https://www.wincert.net/wp-content/uploads/2021/10/update-list-printers.png" alt="" width="643" height="248" /></p>
<p>Upon further investigation, we have noticed that many clients were receiving <em>Access Denied</em> error messages for the printer that was shared on the print server. Users may also receive credential prompts when trying to print or connect to the printer.</p>
<p><img class="alignnone size-full wp-image-4372" src="https://www.wincert.net/wp-content/uploads/2021/10/printer-error.jpg" alt="" width="554" height="264" /></p>
<p>So, in order to resolve this issue, we had to uninstall the patch (<strong>KB5005573</strong>). Along with the patch removal, the printer had to be removed and added again on the client-side, after which the clients were able to print normally again. As removing Cumulative Updates for Windows Server is not a very smart idea if you want to stay protected we had to find possible mitigation until the problem is resolved by Microsoft.</p>
<p>To mitigate this issue we have to edit the registry on the print server.</p>
<p>From the run prompt type Regedit and navigate to the following handle to the registry key.</p>
<p><strong>HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print</strong></p>
<p>in the right pane <strong>right-click</strong> <strong>New</strong> and select <strong>DWORD (32-bit) Value</strong></p>
<p>Create the following key: <strong>RpcAuthnLevelPrivacyEnabled</strong></p>
<p>Leave its <strong>value data</strong> set to <strong>0</strong>.</p>
<p>Close the registry editor and from the <strong>services.msc</strong> snap-in <strong>restart the Print Spooler.</strong></p>
<p>Hope this helps!</p>
<p>Microsoft has acknowledged this printing issue and confirmed that they are working on a resolution. The fix should become available later this month.</p>

Printing issues with cumulative update KB5005573
