@George Abboud @Fabrice Talbot @Sangita Gupta @Yelena Kamyshina 

Hello all, 

We have a use case for a custom community where Guest users should be able to create and retrieve Case and Contact data. As soon as we enable the Guest User Security Settings, Guest users can no longer create and access Case records even when the default internal and external access are Public Read/Write.

We did create a sharing rule to provide access to Guest users but that also does not seem to work since the sharing rule only has Read Only option.

Could one of you help us here? Are we missing something here?