Shared mailbox Permissions

Question

Hi All

I am using exchange hybrid environment, we create users in onprem and migrate to cloud. i have a shared mailbox and i need to provide access to 200 users only to view inbox of shared mailbox. what level of access do i need to provide for the users to shared mailbox. I can see Full Access and Send As permissions but not sure which access do i need to provide.

Answer 1

Hi,

You can use the below command to assign "Reviewer" permission on the Inbox of shared mailbox to the users.

First command to give access on the Top level folder and the second to give to Inbox.

Add-MailboxFolderPermission -Identity Sharedmailbox:\ -User UserName -AccessRights Reviewer

Add-MailboxFolderPermission -Identity Sharedmailbox:\Inbox -User UserName -AccessRights Reviewer

Once done, users can add the shared mailbox to their outlook profile using File-> Account Settings -> advanced -> Add shared mailbox and view only the Inbox.

Create a CSV file with user alias like below and save it as users.csv

use the commands,

Import-Csv users.csv | foreach { Add-MailboxFolderPermission -Identity "SharedMailbox:\" -User $_.alias -AccessRights Reviewer}

Import-Csv users.csv | foreach { Add-MailboxFolderPermission -Identity "SharedMailbox:\Inbox" -User $_.alias -AccessRights Reviewer}

for list of access rights, https://learn.microsoft.com/en-us/powershell/module/exchange/add-mailboxfolderpermission?view=exchange-ps

Answer 2

First of all, ensure that both - the user Mailboxes and the shared Mailbox is in cloud (Exchange Online)
The Reason of this is, Microsoft supports only "Full access" or "send on behalf of" permissions with hybrid, no folder permissions at all across cloud and onpremises

if both in cloud,

1. you should give "Full Access" to yourself
2. add the mailbox to Outlook
3. right click on the inbox folder of the shared mailbox
4. go to "Permissions" Tab
5. choose the people or a mail enabled security group from the address book
6. give them "reviewer" permissions

This should help you. If that works please accept the answer :)

Best
Niklas

Answer 3

Agree with @Niklas , Exchange hybrid deployments support the use of some delagated permissions in on-premise Exchange, but not all.
See Mailbox permissions supported in hybrid environments and Mailbox permissions and capabilities NOT supported in hybrid environments

---

If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.