# Is it possible to restrict the number of available Wowza instances for the monthly subscription license? **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [June 29, 2020, 8:32am UTC](https://community.wowza.com/t/is-it-possible-to-restrict-the-number-of-available-wowza-instances-for-the-monthly-subscription-license/55486 "2020-06-29T08:32:20Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Denis\_Khaletckii](https://avatars.discourse-cdn.com/v4/letter/d/a88e57/32.png) [@Denis\_Khaletckii](https://community.wowza.com/u/Denis_Khaletckii)\ **Post date:** [June 29, 2020, 8:32am UTC](https://community.wowza.com/t/is-it-possible-to-restrict-the-number-of-available-wowza-instances-for-the-monthly-subscription-license/55486/1 "2020-06-29T08:32:20Z")
We use Wowza in a docker container and often rebuild it (several times a day) so I am afraid that we may run several instances by accident. By the way, it is correct that the license can be used on different servers within the billing period without being charged for extra instances unless they are run simultaneously? ---
**Author:** ![Rose\_Power-Wowza\_Com](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/rose_power-wowza_com/32/431_2.png) [@Rose\_Power-Wowza\_Com](https://community.wowza.com/u/Rose_Power-Wowza_Com)\ **Post date:** [June 29, 2020, 3:47pm UTC](https://community.wowza.com/t/is-it-possible-to-restrict-the-number-of-available-wowza-instances-for-the-monthly-subscription-license/55486/2 "2020-06-29T15:47:06Z")
Hi @Denis Khaletckii, not sure how it works, so this will be question for billing. They can answer that for you and look up your account. You can email [customerservice@wowza.com](mailto:customerservice@wowza.com) to get the answer. Thanks… [https://www.wowza.com/community/articles/56891/attn-do-not-post-billing-questions.html](https://www.wowza.com/community/articles/56891/attn-do-not-post-billing-questions.html)