Hi @Jayakumar J ,
Welcome to Microsoft Q&A!
Please kindly understand that the screenshots in your post are so small that I am not able to check the details clearly. In order to better confirm and help solve your issue, would you mind re-adding larger screenshots about your issue for further research?
I tried some search and tests in my Outlook 2016 (16.0.4266.1001) but seems there is no such built-in Resource option, below is the screenshots of my interface:
So, before going further, would you mind providing me with more information related to your issue:
- What's the version of your Outlook 2016? (File > Office Account > About Outlook). Please make sure you have upgraded your Outlook to the latest version.
- What's the type of your account? POP, IMAP or Exchange? Have you logged into the same email account on all the Outlook desktop clients?
- Did you install any third-party add-ins on those Outlook client where you can see the Resource option normally? Please try to compare the add-ins lists of these Outlook desktop clients via File > Options > Add-ins > Manage COM Add-ins > GO, and compare those enabled add-ins to see if there is any difference.
Any update, please feel free to post back.
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