# Pre authorising 1000 SD cards

**URL:** <https://hub.mender.io/t/pre-authorising-1000-sd-cards/6586>\
**Category:** General Discussions\
**Created:** [February 26, 2024, 4:38pm UTC](https://hub.mender.io/t/pre-authorising-1000-sd-cards/6586 "2024-02-26T16:38:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jjsteele](https://avatars.discourse-cdn.com/v4/letter/j/dfb087/32.png) [@jjsteele](https://hub.mender.io/u/jjsteele)\
**Post date:** [February 26, 2024, 4:38pm UTC](https://hub.mender.io/t/pre-authorising-1000-sd-cards/6586/1 "2024-02-26T16:38:06Z")

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How would I pre authorise 1000 SD cards that have been duplicated for us by duplication firm? they have been installed in CM4 devices.

Cheers,

John

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**Author:** ![TheYoctoJester](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/theyoctojester/32/1444_2.png) [@TheYoctoJester](https://hub.mender.io/u/TheYoctoJester)\
**Post date:** [February 27, 2024, 9:18am UTC](https://hub.mender.io/t/pre-authorising-1000-sd-cards/6586/2 "2024-02-27T09:18:21Z")

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Hi @jjsteele,

The usual way is [Preauthorizing devices | Mender documentation](https://docs.mender.io/server-integration/preauthorizing-devices#preauthorize-your-device).  
For more advanced use cases we offer integrations like the mTLS ambassador for Enterprise tier customers. If you are interested in such a solution, please send a mail to [contact@mender.io](mailto:contact@mender.io)

Greets,  
Josef