Hello @Dipak Shinde ,
Thank you for posting here.
Before disabling RC4, please make sure to disable RC4 when it is no longer in use, otherwise it may affect the work of the environment.
Based on the description "We disabled RC4 encryption >> we couldn't connect back to environment (we use Client's Citrix for RDP), we were unable to connect. Reverted GPO settings, enabled RC4, and we were able to login.",
Here are my suggestions:
There may be several aspects involved in this login process: client endpoint, remote endpoint, domain controller endpoint and Citrix endpoint. I’m not sure which endpoint or multiple endpoints only support RC4, but not support strong encryption (such as AES), so you need to check and confirm it, and then if you check it out, it is recommended to set strong encryption (such as AES) in all endpoints , in this case, even if weak encryption （RC4） is disabled, they all support strong encryption, so that you can log in successfully.
- You can capture network package or other methods to check.
- I am sorry, because private information and security information may be involved, the forum does not collect or analyze logs.
Hope the information above is helpful.
Should you have any question or concern, please feel free to let us know.
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