Will logging into MISys Manufacturing Extension (MISys EXT) use one of my User Licenses?

Yes.

MISys EXT uses the same login credentials as MISys Manufacturing. Each time you log into MISys EXT it will consume one of your (available) MISys User Licenses.

The number of User Licenses governs how many concurrent User IDs may be logged into MISys at any given time and would encompass Users who are currently logged into the full MISys Client application, the Worth RF Terminal scanners and/or MISys EXT.