Update 1/19/2021: We have updated and expanded the information contained here in a new blog post. Please go here to read it: All you need to know about automatic email forwarding in Exchange Online
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Updated Jan 19, 2021
Version 6.0
Blog Post
I have been unsuccessful in removing only the "Forward" options in OWA using RBAC:
- Removes the page in “Forwarding” page in Outlook on the web options: Set-ManagementRoleEntry DenyForwarding\Set-Mailbox -RemoveParameter -Parameters DeliverToMailboxAndForward,ForwardingAddress,ForwardingSmtpAddress
Testing:
- I have double checked that those parameters have been removed, from my custom ManagementRoleEntry
- Confirmed in EAC MyBaseOptions are unchecked and only Custom rule is checked. Forward is still available
- In EAC removed all checks MyBaseOptions & my custom entry. Forwarding along with other options are removed from the list of options in OWA
Because I can successfully remove Forward (and other settings) when I uncheck all MyBaseOptions + Custom, the functionality must be available but perhaps more Parameters need to be deleted?