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https://help.tallysolutions.com/docs/te9rel50/Release_Notes/Highlights/Enhanced_Licensing_System.htm

Enhanced Licensing System

Silver Edition License

Silver Edition license which was earlier bound to a single machine can now be used in multiple machines at different points in time.

Multiple users connected in a LAN environment can access the same silver user license. However, only one user can access the license at a time. For a different user to access the same license, all other instances of Tally.ERP 9 must be closed.

For more information, click here.

See also:

Release 5.0