We have Exchange 2013 in Outlook web app reply icon is not showing for the shared mailboxes eventhough I have full mailbox

Hi,

This forum is for general questions and feedback related to Outlook desktop application, since your question is more related to OWA, I'd recommend you post a new question in the Exchange forum for further assistance:

https://social.technet.microsoft.com/Forums/office/en-US/home?forum=exchangesvrclients%2Cexchangesvrunifiedmessaging&filter=alltypes&sort=lastpostdesc

The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.

Steve Fan
TechNet Community Support