Should ESW&UCSS be bought for "installed" or for "used" licenses?

Hi all,
we have a new installation (not an upgrade) of CUCM 9.1. For example, we have 100 UCL Enchansed users and 100 CUWL Standard users. Last year we bought 100 ESW&UCSS for UCL Enchansed users and 100 ESW&UCSS for CUWL Standard users.
Now we would like to renew service contract, but the total amount of licenses in use has been reduced by a half. Now we use only 50 licenses of 100 available for both types of users.
Should we buy 100 ESW&UCSS for "installed"(available) licenses or 50 only for "used" licences?
Does the type of user matter?
Thank you!

Hi,
You need to buy UCSS and ESW for specific users like CUWL standard/enhanced.In your case, u are using only 50 for each user type.
regds,
aman

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