Hi,
If you are facing Active Directory Domain Services unavailable, you can try restarting the Printer Spooler service.
Step 1: Press Windows + R to open Run window. Type services.msc in the empty box and click OK to open Services.
Step 2: Locate the service Print Spooler and right-click it. Choose Properties from the context menu.
Step 3: In the pop-up window, click Stop to disable the service and click OK.
Now you need to delete printer files. Just navigate to the following path: C:\Windows\System32\spool\PRINTERS. Open the PRINTERS folder and delete all the files in it. You might receive the window requiring permission, just click Continue.
Then go back to the Properties window of Print Spooler service. Set the Startup type as Automatic and click Start. Then, click Apply and OK button to save the change.
After that, just restart your computer to check if Active Directory Domain Services unavailable has been removed.
Hope above information can help you.