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The Zarafa base subscription is default located in /etc/zarafa/license/base. When you want to add Client Access subscription to the server, you need to do the following steps:
1. Add a new file in the license directory: touch /etc/zarafa/license/1
2. Register the CAL on the Zarafa Portal
3. Add the CAL numbers to this file: echo 379AS24442 > /etc/zarafa/license/1
When you have more than one CAL, you have to create an extra file with the corresponding serial.