Run AccuZIP6 in Terminal Services
After installing AccuZIP6 from the computer where AccuZIP6 will reside, browse to "C:\Program Files (x86)\AccuZIP6 5.0\iPresort\INI Defaults" and open ADVANCEDSETTINGS.INI with a text editor.
In the Miscellaneous section, you’ll need to add a SILENTMODE option:
[MISC] SILENTMODE=2
Close the advancedsettings.ini file and save the changes, and AccuZIP6 can now run successfully in terminal services.