Edit --> Accessibility --> Change Reading Option is disabled

Hello there
Please find the attached Screenshot of Acrobat Reader in [Server] – 1 and [Server] – 2, I have opened the same Pdf in both the server and verified the accessibility options. In Server] – 2, [Edit --> Accessibility --> Change Reading Option is enabled]. However, in [Server] – 1 Edit --> Accessibility --> Change Reading Option is disabled.
Is there any registry settings that prevent this? We need [Edit --> Accessibility --> Change Reading Option should be enabled in all the server to run our pdf related automation test cases.
Note:
I have tried "Edit --> Preferences--> Reading" & "Edit --> Preferences--> Accessibility". but unable to set "[Edit --> Accessibility --> Change Reading Option]" to enable.
Please find attached screenshot, If anyone had this experience and guide us through it will be greatly helpful.
Thanks
--Vivek

