Frequently Asked Questions
??? "How can I create a new registration token?"
To generate a registration token, you must first define an Application. For detailed instructions, refer to [Managing Applications]({filename}/pages/admin/adp_ag/adp-clnt-profil.md).
??? "Does registration token expire?"
The registration token never expires. Refer to [Managing Applications]({filename}/pages/admin/adp_ag/adp-clnt-profil.md) for details.
??? "Can I reuse one registration token in different applications?"
No, you can't reuse one registration token in different applications. Each application has its own registration token. All the clients that belong to the same application should use the same registration token.
??? "Can I edit any version of a protection policy?"
You can only edit the latest version of a protection policy; however, you can view the older versions. Refer to [Managing Protection Polices]({filename}/pages/admin/adp_ag/adp-prtcn-policy.md) for details.
??? "Can I use older versions of protection policy to protect data?"
You can not protect a piece of data using old versions of protection policy. Protection is always performed using the **latest protection policy version**; however, if you want to reveal the data, you must use the corresponding old protection policy version. Refer to [Managing Protection Polices]({filename}/pages/admin/adp_ag/adp-prtcn-policy.md) for details.
??? "If I delete a protection policy, can I reveal data?"
If a protection policy is deleted, the protected data can not be revealed unless a protection policy with the same name, same version, and same attributes is created on the CipherTrust Manager. Refer to [Managing Protection Polices]({filename}/pages/admin/adp_ag/adp-prtcn-policy.md) for details.
