The third maintenance release for SAS 9.4 is an update-in-place release which works with the same system prerequisites as were in place when you installed 9.4 TS1M2. BTW, you can read about the updates included with 9.4 TS1M3 in the What's New in SAS 9.4 here. Just search for "third maintenance" in the doc.
Users who have manually configured SAS Web Server to use https should follow the instructions in the "Note:" under "Reconfiguring to Use HTTPS" here prior to applying any 9.4 maintenance.
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