for Google Workspace / for Microsoft 365

Question:

Is it possible to access HENNGE Access Control using smart devices?

Answer:

Access from feature phone is not supported by our services.

Feature phone usage is not recommended in Google Workspace, either.
Access through the latest smartphone browser or PC browser is recommended.

【Reference Site】

　https://support.google.com/mail/answer/38689?rd=1&hl=en
　https://support.google.com/a/answer/2473579?hl=en