We are in the process of migrating our company from Lotus Notes to Exchange 2013.  We installed Exchange with split permissions and I use my Account Operator to administer Exchange. We have calendars in Notes that are set up as Mail users for divisions to use as their "Shared Calendar" to put vacation time, hours, etc...  I wanted to create a Shared Mailbox in Exchange to be used at the "Shared Calendar". I tried to create the shared mailbox in the EAC, but I got access denied/insufficient rights.

I then added a new user to AD then went into the EAC and created the mailbox from the user I just created.  All is fine there.  The issue comes when I try to use the Powershell and run this command: 'Set-Mailbox -Identity disproce.calendar@abc.org -Type Shared'.  I once again get the access denied/insufficient access error.  What roles/permissions need to be modified to be able to create a shared mailbox?

Hi ,

Please add your admin account on the below mentioned group and then try to convert the normal mailbox in to the shared mailbox by using the powershell command as you mentioned.

RABC group name : Recipient Management

Hi,

Please make sure that the account you use is a member of Organization Management role group and Recipient Management role group. Then you can use the following cmdlet to create a shared mailbox.

New-Mailbox -Shared -Name "xxx" -DisplayName "xxx" -Alias xxx

For more information, here is an article for your reference.

Create a shared mailbox

https://technet.microsoft.com/en-us/library/jj150570(v=exchg.150).aspx

Hope this can be helpful to you.

Best regards,