Local Printer Redirection to Remote Desktop (for Mac) Not Working After Spooler Service Patch?

Question

Hi Everyone,
Hope you are doing well and safe.

Recently I have noticed that a lot of people who are using the Microsoft Remote Desktop Application for Mac, no matter the version of macOS or Microsoft RDP App, whenever trying to redirect local printers that are perfectly working on the Mac computer, to a Windows 10 machine nothing actually happens and local printers working on the Mac are not redirected to the Windows 10 Machine...

The option for redirecting printers and devices in connection settings is selected and any printers should be redirected, however about a week ago, exactly when the Urgent Security Patch for the Print Spooler Service was released, the redirection of local printers has stopped, not only for me but for friends and clients as well, all of us running different environments, systems, printers and company domains...

Which leads me to believe that the recent patch for the Print Spooler service is responsible for the failed redirection of printers.

We have tried removing the printers from the local computers and adding back again, reinstalling, updating both the macOS and the Microsoft RDP Application, with adding the computers manually to the RDP App via IP and Hostname, and enabling printer redirection and generally redirection of all devices. However none of the printers are redirected... When looking at the available ports on the remote computer I was able to see the redirected port labeled with the correct name (SomeName's Mac PRT), however after the Security Patch to the Spooler Service the ports are left hanging and no printing devices or print queues are being added to the redirected ports.

Has anyone experienced the same issue with local printer redirection after the latest patch, which locked the Print Spooler Service?

I wasn't able to find anything online in regards to the topic so decided to post here.

Do you have any suggestions, except updating Windows, Microsoft RDP Application and macOS to the latest version, making sure the printer redirection is enabled in the RDP app, restarting both computers, re-adding the local printers, reinstalling printer drivers on both the local and remote computers, manually trying to connect the ports to a new printer device (Fails as it requires an interactive session to add a local printer) or even swapping out the perfectly working printer?

I have been only testing the Mac version of the RDP, not sure if Windows to Windows RDP is affected by this...

Thank you for your time and hopefully I am not the only one experiencing this.

Wish you all the best.

Answer 1

HI

1.Which method do this user's client computer(win7,win10) connect to printer ?（by using usb cable, by using wired/wireless network, by using shared printer server )
Are all methods this user's client computer(win7,win10) connect to printer have printer redirection issue?
2. I haven't found known issue in each KB patches mentioned in below document.
Windows Print Spooler Remote Code Execution Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527

3.Could you please download and install Microsoft Remote Desktop Beta for Mac OS Version 10.6.8 (1898) on your device then check if the same issue happen?

Microsoft Remote Desktop Beta for Mac OS Version 10.6.8 (1898)
https://install.appcenter.ms/orgs/rdmacios-k2vy/apps/microsoft-remote-desktop-for-mac/distribution_groups/all-users-of-microsoft-remote-desktop-for-mac

4.Is your Mac computer OS with the latest version?
If your Mac computer OS is old, Is it possible to upgrade one Mac computer OS to latest version then check if the same issue happen?

5."not sure if Windows to Windows RDP is affected by this"

Is it possible to check if the same issue happen on windows device?

If the Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Answer 2

Check if the 'Print spooler' service is running on the server where you are trying to make RDP connection?