"Discovery Manager" role cannot place a mailbox on hold

Question

My Company is testing Exchange 2013 and Exchange Online. We would like to have all discovery functions managed by our legal team.  We have assigned test users the “Discovery Manager” role.  That role should allow them rights to search all mailboxes
and put search results on hold. Additionally, the discovery manager role should allow them to select a user mailbox in EAC, open the "Mailbox Features" page and enable litigation hold on the mailbox (no searching required). 
We have found the second feature, enabling litigation hold without searching, is unavailable to discovery managers when using EAC. The "Mailbox Features" page is not exposed to discovery mangers using EAC.  The discovery manager can place a mailbox
on hold using PowerShell but that would not be a reasonable option for our legal team.
Please confirm if my understanding is correct, discovery manager should be able to place a mailbox on hold as well as in-place hold using EAC.
Thanks in advance,
Ron

Answer 1

Does "Get-RoleGroup "discovery Management" | FL *role*" show that the Legal Hold role is assigned to the Discovery Mgmt role Group? If so, then  you may need to assign the "Recipient Management" or "Help Desk" role to those users as well or if you wish
to security trim their access, create a customized RBAC role for them.
Alternatively, see if they can simply set litigation hold via Powershell with set-mailbox
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